diff --git a/app/assets/javascripts/related_issues/constants.js b/app/assets/javascripts/related_issues/constants.js
index 821f6b525c594915fb1c8e58aa0e1a33d45fc473..2a4ce70511bf682b426e3c3baf7539cf78524f8c 100644
--- a/app/assets/javascripts/related_issues/constants.js
+++ b/app/assets/javascripts/related_issues/constants.js
@@ -1,5 +1,5 @@
 import { __, sprintf } from '~/locale';
-import { TYPE_ISSUE } from '~/issues/constants';
+import { TYPE_EPIC, TYPE_ISSUE } from '~/issues/constants';
 
 export const issuableTypesMap = {
   ISSUE: 'issue',
@@ -32,7 +32,7 @@ export const autoCompleteTextMap = {
       { emphasisStart: '<', emphasisEnd: '>' },
       false,
     ),
-    [issuableTypesMap.EPIC]: sprintf(
+    [TYPE_EPIC]: sprintf(
       __(' or %{emphasisStart}&epic id%{emphasisEnd}'),
       { emphasisStart: '<', emphasisEnd: '>' },
       false,
@@ -45,7 +45,7 @@ export const autoCompleteTextMap = {
   },
   false: {
     [TYPE_ISSUE]: '',
-    [issuableTypesMap.EPIC]: '',
+    [TYPE_EPIC]: '',
     [issuableTypesMap.MERGE_REQUEST]: __(' or references'),
   },
 };
@@ -53,24 +53,24 @@ export const autoCompleteTextMap = {
 export const inputPlaceholderTextMap = {
   [TYPE_ISSUE]: __('Paste issue link'),
   [issuableTypesMap.INCIDENT]: __('Paste link'),
-  [issuableTypesMap.EPIC]: __('Paste epic link'),
+  [TYPE_EPIC]: __('Paste epic link'),
   [issuableTypesMap.MERGE_REQUEST]: __('Enter merge request URLs'),
 };
 
 export const inputPlaceholderConfidentialTextMap = {
   [TYPE_ISSUE]: __('Paste confidential issue link'),
-  [issuableTypesMap.EPIC]: __('Paste confidential epic link'),
+  [TYPE_EPIC]: __('Paste confidential epic link'),
   [issuableTypesMap.MERGE_REQUEST]: __('Enter merge request URLs'),
 };
 
 export const relatedIssuesRemoveErrorMap = {
   [TYPE_ISSUE]: __('An error occurred while removing issues.'),
-  [issuableTypesMap.EPIC]: __('An error occurred while removing epics.'),
+  [TYPE_EPIC]: __('An error occurred while removing epics.'),
 };
 
 export const pathIndeterminateErrorMap = {
   [TYPE_ISSUE]: __('We could not determine the path to remove the issue'),
-  [issuableTypesMap.EPIC]: __('We could not determine the path to remove the epic'),
+  [TYPE_EPIC]: __('We could not determine the path to remove the epic'),
 };
 
 export const itemAddFailureTypesMap = {
@@ -80,7 +80,7 @@ export const itemAddFailureTypesMap = {
 
 export const addRelatedIssueErrorMap = {
   [TYPE_ISSUE]: __('Issue cannot be found.'),
-  [issuableTypesMap.EPIC]: __('Epic cannot be found.'),
+  [TYPE_EPIC]: __('Epic cannot be found.'),
 };
 
 export const addRelatedItemErrorMap = {
@@ -97,7 +97,7 @@ export const addRelatedItemErrorMap = {
 export const issuableIconMap = {
   [TYPE_ISSUE]: 'issues',
   [issuableTypesMap.INCIDENT]: 'issues',
-  [issuableTypesMap.EPIC]: 'epic',
+  [TYPE_EPIC]: 'epic',
 };
 
 export const PathIdSeparator = {
@@ -108,28 +108,28 @@ export const PathIdSeparator = {
 export const issuablesBlockHeaderTextMap = {
   [TYPE_ISSUE]: __('Linked items'),
   [issuableTypesMap.INCIDENT]: __('Linked incidents or issues'),
-  [issuableTypesMap.EPIC]: __('Linked epics'),
+  [TYPE_EPIC]: __('Linked epics'),
 };
 
 export const issuablesBlockHelpTextMap = {
   [TYPE_ISSUE]: __('Learn more about linking issues'),
   [issuableTypesMap.INCIDENT]: __('Learn more about linking issues and incidents'),
-  [issuableTypesMap.EPIC]: __('Learn more about linking epics'),
+  [TYPE_EPIC]: __('Learn more about linking epics'),
 };
 
 export const issuablesBlockAddButtonTextMap = {
   [TYPE_ISSUE]: __('Add a related issue'),
-  [issuableTypesMap.EPIC]: __('Add a related epic'),
+  [TYPE_EPIC]: __('Add a related epic'),
 };
 
 export const issuablesFormCategoryHeaderTextMap = {
   [TYPE_ISSUE]: __('The current issue'),
   [issuableTypesMap.INCIDENT]: __('The current incident'),
-  [issuableTypesMap.EPIC]: __('The current epic'),
+  [TYPE_EPIC]: __('The current epic'),
 };
 
 export const issuablesFormInputTextMap = {
   [TYPE_ISSUE]: __('the following issues'),
   [issuableTypesMap.INCIDENT]: __('the following incidents or issues'),
-  [issuableTypesMap.EPIC]: __('the following epics'),
+  [TYPE_EPIC]: __('the following epics'),
 };
diff --git a/ee/app/assets/javascripts/linked_epics/linked_epics_bundle.js b/ee/app/assets/javascripts/linked_epics/linked_epics_bundle.js
index d9169fb961ae2e2d5aa70b0bc2fef5fe4941c22f..365e9a07fa3b65a860d43cda8abbef97248e36a8 100644
--- a/ee/app/assets/javascripts/linked_epics/linked_epics_bundle.js
+++ b/ee/app/assets/javascripts/linked_epics/linked_epics_bundle.js
@@ -1,7 +1,8 @@
 import Vue from 'vue';
+import { TYPE_EPIC } from '~/issues/constants';
 import { parseBoolean } from '~/lib/utils/common_utils';
 import RelatedEpicsRoot from '~/related_issues/components/related_issues_root.vue';
-import { PathIdSeparator, issuableTypesMap } from '~/related_issues/constants';
+import { PathIdSeparator } from '~/related_issues/constants';
 
 export default function initRelatedEpics() {
   const relatedEpicsRootEl = document.querySelector('#js-related-epics');
@@ -29,7 +30,7 @@ export default function initRelatedEpics() {
             canAdmin: parseBoolean(canAddRelatedEpics),
             showCategorizedIssues: parseBoolean(showCategorizedEpics),
             pathIdSeparator: PathIdSeparator.Epic,
-            issuableType: issuableTypesMap.EPIC,
+            issuableType: TYPE_EPIC,
             autoCompleteIssues: false,
           },
         }),
diff --git a/ee/app/assets/javascripts/related_items_tree/components/related_items_tree_app.vue b/ee/app/assets/javascripts/related_items_tree/components/related_items_tree_app.vue
index 2d6a22c3f48244c4c6b8f3485e70c7e4cd4f25cb..c9fa5feba51cd4e67857e3d807ae2b6e39174610 100644
--- a/ee/app/assets/javascripts/related_items_tree/components/related_items_tree_app.vue
+++ b/ee/app/assets/javascripts/related_items_tree/components/related_items_tree_app.vue
@@ -1,11 +1,10 @@
 <script>
 import { GlLoadingIcon, GlIcon, GlTooltipDirective } from '@gitlab/ui';
 import { mapState, mapActions, mapGetters } from 'vuex';
-import { TYPE_ISSUE } from '~/issues/constants';
+import { TYPE_EPIC, TYPE_ISSUE } from '~/issues/constants';
 import { __, sprintf } from '~/locale';
 import AddItemForm from '~/related_issues/components/add_issuable_form.vue';
 import SlotSwitch from '~/vue_shared/components/slot_switch.vue';
-import { issuableTypesMap } from '~/related_issues/constants';
 import { ITEM_TABS, OVERFLOW_AFTER, i18nConfidentialParent } from '../constants';
 import CreateEpicForm from './create_epic_form.vue';
 import CreateIssueForm from './create_issue_form.vue';
@@ -107,7 +106,7 @@ export default {
       ];
     },
     enableEpicsAutoComplete() {
-      return this.issuableType === issuableTypesMap.EPIC && this.autoCompleteEpics;
+      return this.issuableType === TYPE_EPIC && this.autoCompleteEpics;
     },
     enableIssuesAutoComplete() {
       return this.issuableType === TYPE_ISSUE && this.autoCompleteIssues;
diff --git a/ee/app/assets/javascripts/related_items_tree/components/related_items_tree_header.vue b/ee/app/assets/javascripts/related_items_tree/components/related_items_tree_header.vue
index 2ca64a7ae429d7646aeafa6813ef32deab1f16e9..4b5073a3badb6514bf7831920e0bde680373bac6 100644
--- a/ee/app/assets/javascripts/related_items_tree/components/related_items_tree_header.vue
+++ b/ee/app/assets/javascripts/related_items_tree/components/related_items_tree_header.vue
@@ -1,8 +1,7 @@
 <script>
 import { GlAlert, GlPopover, GlIcon, GlButton } from '@gitlab/ui';
 import { mapState, mapActions } from 'vuex';
-import { TYPE_ISSUE } from '~/issues/constants';
-import { issuableTypesMap } from '~/related_issues/constants';
+import { TYPE_EPIC, TYPE_ISSUE } from '~/issues/constants';
 import { __ } from '~/locale';
 import { i18n, treeTitle, ParentType } from '../constants';
 import EpicHealthStatus from './epic_health_status.vue';
@@ -77,7 +76,7 @@ export default {
     },
     showAddEpicForm() {
       this.toggleAddItemForm({
-        issuableType: issuableTypesMap.EPIC,
+        issuableType: TYPE_EPIC,
         toggleState: true,
       });
     },
diff --git a/ee/app/assets/javascripts/related_items_tree/store/getters.js b/ee/app/assets/javascripts/related_items_tree/store/getters.js
index 2bb094277ccbd1e477214a32659d36f44de5a16c..f08311be02103f80465c721784108e586de1d2ab 100644
--- a/ee/app/assets/javascripts/related_items_tree/store/getters.js
+++ b/ee/app/assets/javascripts/related_items_tree/store/getters.js
@@ -1,4 +1,5 @@
-import { issuableTypesMap, PathIdSeparator } from '~/related_issues/constants';
+import { TYPE_EPIC } from '~/issues/constants';
+import { PathIdSeparator } from '~/related_issues/constants';
 import { processIssueTypeIssueSources } from '../utils/epic_utils';
 
 export const autoCompleteSources = () => gl.GfmAutoComplete && gl.GfmAutoComplete.dataSources;
@@ -26,4 +27,4 @@ export const itemAutoCompleteSources = (state, getters) => {
 export const itemPathIdSeparator = (state, getters) =>
   getters.isEpic ? PathIdSeparator.Epic : PathIdSeparator.Issue;
 
-export const isEpic = (state) => state.issuableType === issuableTypesMap.EPIC;
+export const isEpic = (state) => state.issuableType === TYPE_EPIC;
diff --git a/ee/app/assets/javascripts/related_items_tree/store/mutations.js b/ee/app/assets/javascripts/related_items_tree/store/mutations.js
index b6dea98896e79233a8d2675bfe6117d45f72c873..7e5587c97c3fea451f4ace14a645e31b0f0d9ae9 100644
--- a/ee/app/assets/javascripts/related_items_tree/store/mutations.js
+++ b/ee/app/assets/javascripts/related_items_tree/store/mutations.js
@@ -1,6 +1,5 @@
 import Vue from 'vue';
-import { TYPE_ISSUE } from '~/issues/constants';
-import { issuableTypesMap } from '~/related_issues/constants';
+import { TYPE_EPIC, TYPE_ISSUE } from '~/issues/constants';
 import * as types from './mutation_types';
 
 export default {
@@ -167,7 +166,7 @@ export default {
     state.showCreateEpicForm = toggleState;
     state.showAddItemForm = false;
     state.showCreateIssueForm = false;
-    state.issuableType = issuableTypesMap.EPIC;
+    state.issuableType = TYPE_EPIC;
   },
 
   [types.TOGGLE_CREATE_ISSUE_FORM](state, { toggleState }) {
diff --git a/ee/spec/frontend/related_items_tree/components/related_items_tree_app_spec.js b/ee/spec/frontend/related_items_tree/components/related_items_tree_app_spec.js
index eb2aea5d60664001ab8897c6260d29f8c95aade2..294ccea26453606b7b522a1351b0cdf7d0a06b44 100644
--- a/ee/spec/frontend/related_items_tree/components/related_items_tree_app_spec.js
+++ b/ee/spec/frontend/related_items_tree/components/related_items_tree_app_spec.js
@@ -15,11 +15,10 @@ import RelatedItemsTreeBody from 'ee/related_items_tree/components/related_items
 import RelatedItemsRoadmapApp from 'ee/related_items_tree/components/related_items_roadmap_app.vue';
 
 import createDefaultStore from 'ee/related_items_tree/store';
-import { TYPE_ISSUE } from '~/issues/constants';
+import { TYPE_EPIC, TYPE_ISSUE } from '~/issues/constants';
 import axios from '~/lib/utils/axios_utils';
 import { HTTP_STATUS_OK } from '~/lib/utils/http_status';
 import { ITEM_TABS } from 'ee/related_items_tree/constants';
-import { issuableTypesMap } from '~/related_issues/constants';
 
 import { mockInitialConfig, mockParentItem, mockEpics, mockIssues } from '../mock_data';
 
@@ -238,7 +237,7 @@ describe('RelatedItemsTreeApp', () => {
     it('renders item add/create form container element', async () => {
       wrapper.vm.$store.dispatch('toggleAddItemForm', {
         toggleState: true,
-        issuableType: issuableTypesMap.EPIC,
+        issuableType: TYPE_EPIC,
       });
 
       await nextTick();
@@ -250,9 +249,9 @@ describe('RelatedItemsTreeApp', () => {
     });
 
     it.each`
-      issuableType             | autoCompleteIssues | autoCompleteEpics | expectedAutoCompleteIssues | expectedAutoCompleteEpics
-      ${TYPE_ISSUE}            | ${true}            | ${true}           | ${true}                    | ${false}
-      ${issuableTypesMap.EPIC} | ${true}            | ${true}           | ${false}                   | ${true}
+      issuableType  | autoCompleteIssues | autoCompleteEpics | expectedAutoCompleteIssues | expectedAutoCompleteEpics
+      ${TYPE_ISSUE} | ${true}            | ${true}           | ${true}                    | ${false}
+      ${TYPE_EPIC}  | ${true}            | ${true}           | ${false}                   | ${true}
     `(
       'enables $issuableType autocomplete only when "issuableType" is "$issuableType" and autocomplete for it is supported',
       async ({
diff --git a/ee/spec/frontend/related_items_tree/components/related_items_tree_header_spec.js b/ee/spec/frontend/related_items_tree/components/related_items_tree_header_spec.js
index 289347dab82554aa07d3ebdc4f36dc9053698d4f..10f009a2ed686f7ce43a030fdc4f6e6b964bc820 100644
--- a/ee/spec/frontend/related_items_tree/components/related_items_tree_header_spec.js
+++ b/ee/spec/frontend/related_items_tree/components/related_items_tree_header_spec.js
@@ -9,8 +9,7 @@ import RelatedItemsTreeHeader from 'ee/related_items_tree/components/related_ite
 import createDefaultStore from 'ee/related_items_tree/store';
 import * as epicUtils from 'ee/related_items_tree/utils/epic_utils';
 
-import { TYPE_ISSUE } from '~/issues/constants';
-import { issuableTypesMap } from '~/related_issues/constants';
+import { TYPE_EPIC, TYPE_ISSUE } from '~/issues/constants';
 import { mockInitialConfig, mockParentItem, mockQueryResponse } from '../mock_data';
 
 Vue.use(Vuex);
@@ -111,7 +110,7 @@ describe('RelatedItemsTree', () => {
           const payload = toggleAddItemForm.mock.calls[0][1];
 
           expect(payload).toEqual({
-            issuableType: issuableTypesMap.EPIC,
+            issuableType: TYPE_EPIC,
             toggleState: true,
           });
         });
diff --git a/ee/spec/frontend/related_items_tree/store/actions_spec.js b/ee/spec/frontend/related_items_tree/store/actions_spec.js
index 058fbe4cdcf6035a45954d1451717a261948277b..d3015df12106e76cb2e5b83e94e164dff7089480 100644
--- a/ee/spec/frontend/related_items_tree/store/actions_spec.js
+++ b/ee/spec/frontend/related_items_tree/store/actions_spec.js
@@ -17,13 +17,10 @@ import Tracking from '~/tracking';
 import testAction from 'helpers/vuex_action_helper';
 import { TEST_HOST } from 'spec/test_constants';
 import { createAlert } from '~/flash';
+import { TYPE_EPIC } from '~/issues/constants';
 import axios from '~/lib/utils/axios_utils';
 import { HTTP_STATUS_INTERNAL_SERVER_ERROR, HTTP_STATUS_OK } from '~/lib/utils/http_status';
-import {
-  issuableTypesMap,
-  itemAddFailureTypesMap,
-  PathIdSeparator,
-} from '~/related_issues/constants';
+import { itemAddFailureTypesMap, PathIdSeparator } from '~/related_issues/constants';
 
 import {
   mockInitialConfig,
@@ -930,7 +927,7 @@ describe('RelatedItemTree', () => {
 
       describe('receiveAddItemSuccess', () => {
         it('should set `state.itemAddInProgress` to false and dispatches actions `setPendingReferences`, `setItemInputValue` and `toggleAddItemForm`', () => {
-          state.issuableType = issuableTypesMap.EPIC;
+          state.issuableType = TYPE_EPIC;
           state.isEpic = true;
 
           const mockEpicsWithoutPerm = mockEpics.map((item) => ({
@@ -1025,7 +1022,7 @@ describe('RelatedItemTree', () => {
         });
 
         it('should dispatch `requestAddItem` and `receiveAddItemSuccess` actions on request success', () => {
-          state.issuableType = issuableTypesMap.EPIC;
+          state.issuableType = TYPE_EPIC;
           state.epicsEndpoint = '/foo/bar';
           state.pendingReferences = ['foo'];
           state.isEpic = true;
@@ -1079,7 +1076,7 @@ describe('RelatedItemTree', () => {
         });
 
         it('should dispatch `requestAddItem` and `receiveAddItemFailure` actions on request failure', () => {
-          state.issuableType = issuableTypesMap.EPIC;
+          state.issuableType = TYPE_EPIC;
           state.epicsEndpoint = '/foo/bar';
           state.pendingReferences = ['foo'];
 
@@ -1122,7 +1119,7 @@ describe('RelatedItemTree', () => {
           state.parentItem = {
             fullPath: createdEpic.group.fullPath,
           };
-          state.issuableType = issuableTypesMap.EPIC;
+          state.issuableType = TYPE_EPIC;
           state.isEpic = true;
 
           testAction(
@@ -1188,7 +1185,7 @@ describe('RelatedItemTree', () => {
         beforeEach(() => {
           mock = new MockAdapter(axios);
           state.parentItem = mockParentItem;
-          state.issuableType = issuableTypesMap.EPIC;
+          state.issuableType = TYPE_EPIC;
         });
 
         afterEach(() => {
@@ -1779,7 +1776,7 @@ describe('RelatedItemTree', () => {
         beforeEach(() => {
           mock = new MockAdapter(axios);
           state.parentItem = mockParentItem;
-          state.issuableType = issuableTypesMap.EPIC;
+          state.issuableType = TYPE_EPIC;
         });
 
         afterEach(() => {
diff --git a/ee/spec/frontend/related_items_tree/store/getters_spec.js b/ee/spec/frontend/related_items_tree/store/getters_spec.js
index 450f17f43b867e7f3c4fe7c7d312b71fe0a54af7..6440082d82c42b4633f6233239b64c2b2d0729b0 100644
--- a/ee/spec/frontend/related_items_tree/store/getters_spec.js
+++ b/ee/spec/frontend/related_items_tree/store/getters_spec.js
@@ -1,7 +1,6 @@
 import * as getters from 'ee/related_items_tree/store/getters';
 import createDefaultState from 'ee/related_items_tree/store/state';
-import { TYPE_ISSUE } from '~/issues/constants';
-import { issuableTypesMap } from '~/related_issues/constants';
+import { TYPE_EPIC, TYPE_ISSUE } from '~/issues/constants';
 
 import { mockEpic1, mockEpic2 } from '../mock_data';
 
@@ -64,7 +63,7 @@ describe('RelatedItemsTree', () => {
             autoCompleteSources: 'foo',
             isEpic: true,
           };
-          state.issuableType = issuableTypesMap.Epic;
+          state.issuableType = TYPE_EPIC;
           state.autoCompleteEpics = true;
 
           expect(getters.itemAutoCompleteSources(state, mockGetter)).toBe('foo');
@@ -127,10 +126,10 @@ describe('RelatedItemsTree', () => {
 
       describe('isEpic', () => {
         it.each`
-          issuableType             | expectedValue
-          ${null}                  | ${false}
-          ${TYPE_ISSUE}            | ${false}
-          ${issuableTypesMap.EPIC} | ${true}
+          issuableType  | expectedValue
+          ${null}       | ${false}
+          ${TYPE_ISSUE} | ${false}
+          ${TYPE_EPIC}  | ${true}
         `(
           'for issuableType = issuableType is $expectedValue',
           ({ issuableType, expectedValue }) => {
diff --git a/spec/frontend/issuable/related_issues/components/add_issuable_form_spec.js b/spec/frontend/issuable/related_issues/components/add_issuable_form_spec.js
index e1546f74a59d67683c3dfd9d9e5ded81bee7a5c1..72fcab63ba70bcafdb1d36797e7ccb98c61b9817 100644
--- a/spec/frontend/issuable/related_issues/components/add_issuable_form_spec.js
+++ b/spec/frontend/issuable/related_issues/components/add_issuable_form_spec.js
@@ -1,10 +1,10 @@
 import { GlFormGroup } from '@gitlab/ui';
 import { mount, shallowMount } from '@vue/test-utils';
 import { nextTick } from 'vue';
-import { TYPE_ISSUE } from '~/issues/constants';
+import { TYPE_EPIC, TYPE_ISSUE } from '~/issues/constants';
 import AddIssuableForm from '~/related_issues/components/add_issuable_form.vue';
 import IssueToken from '~/related_issues/components/issue_token.vue';
-import { issuableTypesMap, linkedIssueTypesMap, PathIdSeparator } from '~/related_issues/constants';
+import { linkedIssueTypesMap, PathIdSeparator } from '~/related_issues/constants';
 
 const issuable1 = {
   id: 200,
@@ -143,7 +143,7 @@ describe('AddIssuableForm', () => {
         wrapper = shallowMount(AddIssuableForm, {
           propsData: {
             inputValue: '',
-            issuableType: issuableTypesMap.EPIC,
+            issuableType: TYPE_EPIC,
             pathIdSeparator,
             pendingReferences: [],
           },
@@ -157,9 +157,9 @@ describe('AddIssuableForm', () => {
 
     describe('categorized issuables', () => {
       it.each`
-        issuableType             | pathIdSeparator          | contextHeader          | contextFooter
-        ${TYPE_ISSUE}            | ${PathIdSeparator.Issue} | ${'The current issue'} | ${'the following issues'}
-        ${issuableTypesMap.EPIC} | ${PathIdSeparator.Epic}  | ${'The current epic'}  | ${'the following epics'}
+        issuableType  | pathIdSeparator          | contextHeader          | contextFooter
+        ${TYPE_ISSUE} | ${PathIdSeparator.Issue} | ${'The current issue'} | ${'the following issues'}
+        ${TYPE_EPIC}  | ${PathIdSeparator.Epic}  | ${'The current epic'}  | ${'the following epics'}
       `(
         'show header text as "$contextHeader" and footer text as "$contextFooter" issuableType is set to $issuableType',
         ({ issuableType, contextHeader, contextFooter }) => {