diff --git a/ee/spec/lib/gitlab/import_export/attributes_permitter_spec.rb b/ee/spec/lib/gitlab/import_export/attributes_permitter_spec.rb
index 2ddbfe381c225cc4f4912afa01a60d91ae8659cd..1cb989c051b36ae86e2799006826686d04e37c3a 100644
--- a/ee/spec/lib/gitlab/import_export/attributes_permitter_spec.rb
+++ b/ee/spec/lib/gitlab/import_export/attributes_permitter_spec.rb
@@ -27,9 +27,11 @@
 
     subject { described_class.new }
 
+    additional_attributes = { user: %w[id] }
+
     Gitlab::ImportExport::Config.new.to_h[:included_attributes].each do |relation_sym, permitted_attributes|
       context "for #{relation_sym}" do
-        it_behaves_like 'a permitted attribute', relation_sym, permitted_attributes
+        it_behaves_like 'a permitted attribute', relation_sym, permitted_attributes, additional_attributes[relation_sym]
       end
     end
   end
diff --git a/lib/gitlab/import_export/attributes_permitter.rb b/lib/gitlab/import_export/attributes_permitter.rb
index 2d8e25a9f70a3e3d495920e3ac02c613d054302f..f6f65f855990e5dad377002a6dc5706a6ca86cdf 100644
--- a/lib/gitlab/import_export/attributes_permitter.rb
+++ b/lib/gitlab/import_export/attributes_permitter.rb
@@ -44,7 +44,7 @@ class AttributesPermitter
 
       # We want to use AttributesCleaner for these relations instead, in the future this should be removed to make sure
       # we are using AttributesPermitter for every imported relation.
-      DISABLED_RELATION_NAMES = %i[user author issuable_sla].freeze
+      DISABLED_RELATION_NAMES = %i[author issuable_sla].freeze
 
       def initialize(config: ImportExport::Config.new.to_h)
         @config = config
diff --git a/lib/gitlab/import_export/project/import_export.yml b/lib/gitlab/import_export/project/import_export.yml
index 71a8d747963a6f4944458538000c745142ce883d..fa1279ca1203a2ae90511a323f4916e21025d827 100644
--- a/lib/gitlab/import_export/project/import_export.yml
+++ b/lib/gitlab/import_export/project/import_export.yml
@@ -178,17 +178,7 @@ included_attributes:
     - :project_id
     - :key
     - :value
-  label:
-    - :title
-    - :color
-    - :project_id
-    - :group_id
-    - :created_at
-    - :updated_at
-    - :template
-    - :description
-    - :priority
-  labels:
+  label: &label_definition
     - :title
     - :color
     - :project_id
@@ -198,23 +188,13 @@ included_attributes:
     - :template
     - :description
     - :priority
+  labels: *label_definition
   priorities:
     - :project_id
     - :priority
     - :created_at
     - :updated_at
-  milestone:
-    - :iid
-    - :title
-    - :project_id
-    - :group_id
-    - :description
-    - :due_date
-    - :created_at
-    - :updated_at
-    - :start_date
-    - :state
-  milestones:
+  milestone: &milestone_definition
     - :iid
     - :title
     - :project_id
@@ -225,6 +205,7 @@ included_attributes:
     - :updated_at
     - :start_date
     - :state
+  milestones: *milestone_definition
   protected_branches:
     - :project_id
     - :name
@@ -315,6 +296,200 @@ included_attributes:
     - :project_id
     - :issue_template_key
     - :project_key
+  snippets:
+    - :title
+    - :content
+    - :author_id
+    - :project_id
+    - :created_at
+    - :updated_at
+    - :file_name
+    - :visibility_level
+    - :description
+  project_members:
+    - :access_level
+    - :source_type
+    - :user_id
+    - :notification_level
+    - :created_at
+    - :updated_at
+    - :created_by_id
+    - :invite_email
+    - :invite_accepted_at
+    - :requested_at
+    - :expires_at
+    - :ldap
+    - :override
+  merge_request: &merge_request_definition
+    - :target_branch
+    - :source_branch
+    - :source_project_id
+    - :author_id
+    - :assignee_id
+    - :title
+    - :created_at
+    - :updated_at
+    - :state
+    - :merge_status
+    - :target_project_id
+    - :iid
+    - :description
+    - :updated_by_id
+    - :merge_error
+    - :merge_params
+    - :merge_when_pipeline_succeeds
+    - :merge_user_id
+    - :merge_commit_sha
+    - :squash_commit_sha
+    - :in_progress_merge_commit_sha
+    - :lock_version
+    - :approvals_before_merge
+    - :rebase_commit_sha
+    - :time_estimate
+    - :squash
+    - :last_edited_at
+    - :last_edited_by_id
+    - :discussion_locked
+    - :allow_maintainer_to_push
+    - :merge_ref_sha
+    - :draft
+    - :diff_head_sha
+    - :source_branch_sha
+    - :target_branch_sha
+  merge_requests: *merge_request_definition
+  award_emoji:
+    - :user_id
+    - :name
+    - :awardable_type
+    - :created_at
+    - :updated_at
+  commit_author:
+    - :name
+    - :email
+  committer:
+    - :name
+    - :email
+  events:
+    - :target_type
+    - :action
+    - :author_id
+    - :fingerprint
+    - :created_at
+    - :updated_at
+  label_links:
+    - :target_type
+    - :created_at
+    - :updated_at
+  merge_request_diff:
+    - :state
+    - :created_at
+    - :updated_at
+    - :base_commit_sha
+    - :real_size
+    - :head_commit_sha
+    - :start_commit_sha
+    - :commits_count
+    - :files_count
+    - :sorted
+    - :diff_type
+  merge_request_diff_commits:
+    - :relative_order
+    - :sha
+    - :authored_date
+    - :committed_date
+    - :message
+    - :trailers
+  merge_request_diff_files:
+    - :relative_order
+    - :new_file
+    - :renamed_file
+    - :deleted_file
+    - :new_path
+    - :old_path
+    - :a_mode
+    - :b_mode
+    - :too_large
+    - :binary
+    - :diff
+  metrics:
+    - :created_at
+    - :updated_at
+    - :latest_closed_by_id
+    - :latest_closed_at
+    - :merged_by_id
+    - :merged_at
+    - :latest_build_started_at
+    - :latest_build_finished_at
+    - :first_deployed_to_production_at
+    - :first_comment_at
+    - :first_commit_at
+    - :last_commit_at
+    - :diff_size
+    - :modified_paths_size
+    - :commits_count
+    - :first_approved_at
+    - :first_reassigned_at
+    - :added_lines
+    - :target_project_id
+    - :removed_lines
+  notes:
+    - :note
+    - :noteable_type
+    - :author_id
+    - :created_at
+    - :updated_at
+    - :project_id
+    - :attachment
+    - :line_code
+    - :commit_id
+    - :system
+    - :st_diff
+    - :updated_by_id
+    - :type
+    - :position
+    - :original_position
+    - :change_position
+    - :resolved_at
+    - :resolved_by_id
+    - :resolved_by_push
+    - :discussion_id
+    - :confidential
+    - :last_edited_at
+  push_event_payload:
+    - :commit_count
+    - :action
+    - :ref_type
+    - :commit_from
+    - :commit_to
+    - :ref
+    - :commit_title
+    - :ref_count
+  resource_label_events:
+    - :action
+    - :user_id
+    - :created_at
+  suggestions:
+    - :relative_order
+    - :applied
+    - :commit_id
+    - :from_content
+    - :to_content
+    - :outdated
+    - :lines_above
+    - :lines_below
+  system_note_metadata:
+    - :commit_count
+    - :action
+    - :created_at
+    - :updated_at
+  timelogs:
+    - :time_spent
+    - :user_id
+    - :project_id
+    - :spent_at
+    - :created_at
+    - :updated_at
+    - :summary
 
 # Do not include the following attributes for the models specified.
 excluded_attributes:
@@ -434,16 +609,7 @@ excluded_attributes:
     - :service_desk_reply_to
     - :upvotes_count
     - :work_item_type_id
-  merge_request:
-    - :milestone_id
-    - :sprint_id
-    - :ref_fetched
-    - :merge_jid
-    - :rebase_jid
-    - :latest_merge_request_diff_id
-    - :head_pipeline_id
-    - :state_id
-  merge_requests:
+  merge_request: &merge_request_excluded_definition
     - :milestone_id
     - :sprint_id
     - :ref_fetched
@@ -452,6 +618,7 @@ excluded_attributes:
     - :latest_merge_request_diff_id
     - :head_pipeline_id
     - :state_id
+  merge_requests: *merge_request_excluded_definition
   award_emoji:
     - :awardable_id
   statuses:
@@ -520,10 +687,9 @@ excluded_attributes:
     - :issue_id
   zoom_meetings:
     - :issue_id
-  design:
-    - :issue_id
-  designs:
+  design: &design_excluded_definition
     - :issue_id
+  designs: *design_excluded_definition
   design_versions:
     - :issue_id
   actions:
diff --git a/spec/lib/gitlab/import_export/attributes_permitter_spec.rb b/spec/lib/gitlab/import_export/attributes_permitter_spec.rb
index 55422ec3ef2608dffd80b66fa26721e26427ef72..4fea61ec3a82f697d76c485a5deaa29d9c07e6e0 100644
--- a/spec/lib/gitlab/import_export/attributes_permitter_spec.rb
+++ b/spec/lib/gitlab/import_export/attributes_permitter_spec.rb
@@ -80,8 +80,8 @@
 
     let(:attributes_permitter) { described_class.new }
 
-    where(:relation_name, :permitted_attributes_defined) do
-      :user                        | false
+    where(:relation_name, :permitted_attributes_defined ) do
+      :user                        | true
       :author                      | false
       :ci_cd_settings              | true
       :metrics_setting             | true
@@ -91,6 +91,7 @@
       :auto_devops                 | true
       :boards                      | true
       :custom_attributes           | true
+      :label                       | true
       :labels                      | true
       :protected_branches          | true
       :protected_tags              | true
@@ -99,6 +100,28 @@
       :push_access_levels          | true
       :releases                    | true
       :links                       | true
+      :priorities                  | true
+      :milestone                   | true
+      :milestones                  | true
+      :snippets                    | true
+      :project_members             | true
+      :merge_request               | true
+      :merge_requests              | true
+      :award_emoji                 | true
+      :commit_author               | true
+      :committer                   | true
+      :events                      | true
+      :label_links                 | true
+      :merge_request_diff          | true
+      :merge_request_diff_commits  | true
+      :merge_request_diff_files    | true
+      :metrics                     | true
+      :notes                       | true
+      :push_event_payload          | true
+      :resource_label_events       | true
+      :suggestions                 | true
+      :system_note_metadata        | true
+      :timelogs                    | true
       :container_expiration_policy | true
       :project_feature             | true
       :prometheus_metrics          | true
@@ -113,9 +136,11 @@
   describe 'included_attributes for Project' do
     subject { described_class.new }
 
+    additional_attributes = { user: %w[id] }
+
     Gitlab::ImportExport::Config.new.to_h[:included_attributes].each do |relation_sym, permitted_attributes|
       context "for #{relation_sym}" do
-        it_behaves_like 'a permitted attribute', relation_sym, permitted_attributes
+        it_behaves_like 'a permitted attribute', relation_sym, permitted_attributes, additional_attributes[relation_sym]
       end
     end
   end
diff --git a/spec/support/shared_examples/lib/gitlab/import_export/attributes_permitter_shared_examples.rb b/spec/support/shared_examples/lib/gitlab/import_export/attributes_permitter_shared_examples.rb
index 5ce698c470182d9952c88d48038f9d760162be8b..41d3d76b66b6b3c685fbedfe45e26d2ea6c0da31 100644
--- a/spec/support/shared_examples/lib/gitlab/import_export/attributes_permitter_shared_examples.rb
+++ b/spec/support/shared_examples/lib/gitlab/import_export/attributes_permitter_shared_examples.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
-RSpec.shared_examples 'a permitted attribute' do |relation_sym, permitted_attributes|
+RSpec.shared_examples 'a permitted attribute' do |relation_sym, permitted_attributes, additional_attributes = []|
   let(:prohibited_attributes) { %i[remote_url my_attributes my_ids token my_id test] }
 
   let(:import_export_config) { Gitlab::ImportExport::Config.new.to_h }
@@ -26,7 +26,7 @@
     end
 
     it 'does not contain attributes that would be cleaned with AttributeCleaner' do
-      expect(cleaned_hash.keys).to include(*permitted_hash.keys)
+      expect(cleaned_hash.keys + additional_attributes.to_a).to include(*permitted_hash.keys)
     end
 
     it 'does not contain prohibited attributes that are not related to given relation' do