diff --git a/app/models/application_setting.rb b/app/models/application_setting.rb
index 827f8bc93bef8fa41657c598f6cff3eda1ba9888..2c47404b0e3455d6760e071416b2a0038ec3032f 100644
--- a/app/models/application_setting.rb
+++ b/app/models/application_setting.rb
@@ -39,6 +39,7 @@ class ApplicationSetting < MainClusterwide::ApplicationRecord
     encrypted_tofa_url_iv
     vertex_project
   ], remove_with: '16.3', remove_after: '2023-07-22'
+  ignore_column :dashboard_notification_limit, remove_with: '16.5', remove_after: '2023-08-22'
 
   INSTANCE_REVIEW_MIN_USERS = 50
   GRAFANA_URL_ERROR_MESSAGE = 'Please check your Grafana URL setting in ' \
diff --git a/ee/app/models/ee/application_setting.rb b/ee/app/models/ee/application_setting.rb
index 51e6bb69b9c7d6a06ed683acd465e9f3c998124d..8af5fe991657725aa09d45d98bade4339602df2c 100644
--- a/ee/app/models/ee/application_setting.rb
+++ b/ee/app/models/ee/application_setting.rb
@@ -149,7 +149,6 @@ module ApplicationSetting
 
       with_options(presence: true, numericality: { only_integer: true, greater_than_or_equal_to: 0 }) do
         validates :dashboard_limit
-        validates :dashboard_notification_limit
         validates :dashboard_enforcement_limit
       end
 
@@ -231,7 +230,6 @@ def defaults
           custom_project_templates_group_id: nil,
           dashboard_limit_enabled: false,
           dashboard_limit: 0,
-          dashboard_notification_limit: 0,
           dashboard_enforcement_limit: 0,
           dashboard_limit_new_namespace_creation_enforcement_date: nil,
           default_project_deletion_protection: false,
diff --git a/ee/spec/models/application_setting_spec.rb b/ee/spec/models/application_setting_spec.rb
index 15a39eff3c763d5748689923dbc31b8d3144e3cb..2713c863848bf538c6591cd5efaa05f121827752 100644
--- a/ee/spec/models/application_setting_spec.rb
+++ b/ee/spec/models/application_setting_spec.rb
@@ -156,7 +156,6 @@
 
     describe 'dashboard', feature_category: :metrics do
       it { is_expected.to validate_numericality_of(:dashboard_limit).only_integer.is_greater_than_or_equal_to(0) }
-      it { is_expected.to validate_numericality_of(:dashboard_notification_limit).only_integer.is_greater_than_or_equal_to(0) }
       it { is_expected.to validate_numericality_of(:dashboard_enforcement_limit).only_integer.is_greater_than_or_equal_to(0) }
       it { is_expected.to allow_value(true, false).for(:dashboard_limit_enabled) }
       it { is_expected.not_to allow_value(nil).for(:dashboard_limit_enabled) }