diff --git a/db/migrate/20230207012217_initialize_conversion_of_vulnerability_user_mentions_note_id_to_bigint.rb b/db/migrate/20230207012217_initialize_conversion_of_vulnerability_user_mentions_note_id_to_bigint.rb
new file mode 100644
index 0000000000000000000000000000000000000000..feaf705a77057ff8d00eb9d3ea367d53350203dc
--- /dev/null
+++ b/db/migrate/20230207012217_initialize_conversion_of_vulnerability_user_mentions_note_id_to_bigint.rb
@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+class InitializeConversionOfVulnerabilityUserMentionsNoteIdToBigint < Gitlab::Database::Migration[2.1]
+  TABLE = :vulnerability_user_mentions
+  COLUMNS = %i[note_id]
+
+  enable_lock_retries!
+
+  def up
+    initialize_conversion_of_integer_to_bigint(TABLE, COLUMNS)
+  end
+
+  def down
+    revert_initialize_conversion_of_integer_to_bigint(TABLE, COLUMNS)
+  end
+end
diff --git a/db/post_migrate/20230207012238_backfill_vulnerability_user_mentions_note_id_for_bigint_conversion.rb b/db/post_migrate/20230207012238_backfill_vulnerability_user_mentions_note_id_for_bigint_conversion.rb
new file mode 100644
index 0000000000000000000000000000000000000000..e6d674c09cecb5f4801aaf602b08c4403c1f9b6a
--- /dev/null
+++ b/db/post_migrate/20230207012238_backfill_vulnerability_user_mentions_note_id_for_bigint_conversion.rb
@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+class BackfillVulnerabilityUserMentionsNoteIdForBigintConversion < Gitlab::Database::Migration[2.1]
+  TABLE = :vulnerability_user_mentions
+  COLUMNS = %i[note_id]
+
+  restrict_gitlab_migration gitlab_schema: :gitlab_main
+
+  def up
+    backfill_conversion_of_integer_to_bigint(TABLE, COLUMNS)
+  end
+
+  def down
+    revert_backfill_conversion_of_integer_to_bigint(TABLE, COLUMNS)
+  end
+end
diff --git a/db/schema_migrations/20230207012217 b/db/schema_migrations/20230207012217
new file mode 100644
index 0000000000000000000000000000000000000000..e0709cfd57a5718976b5b0107b80741264d462e4
--- /dev/null
+++ b/db/schema_migrations/20230207012217
@@ -0,0 +1 @@
+e9b82380fc23c85bf9f4dc6595a4eb59eedfe696f5dc256141e8b4a7ebaa6ee3
\ No newline at end of file
diff --git a/db/schema_migrations/20230207012238 b/db/schema_migrations/20230207012238
new file mode 100644
index 0000000000000000000000000000000000000000..4c5d782a1c06eec7313dd3e2fec182bfc17c4ce8
--- /dev/null
+++ b/db/schema_migrations/20230207012238
@@ -0,0 +1 @@
+d3789404b6ecb38eabfa75c41db936bceb2aa219c770764d30caca6d94358ba4
\ No newline at end of file
diff --git a/db/structure.sql b/db/structure.sql
index 8fadb91843fd8f0dea87f52cc247f92a430e3438..f537b44e92ba6c2ab2ec500610b5c38061fff142 100644
--- a/db/structure.sql
+++ b/db/structure.sql
@@ -225,6 +225,15 @@ RETURN NULL;
 END
 $$;
 
+CREATE FUNCTION trigger_0e214b8a14f2() RETURNS trigger
+    LANGUAGE plpgsql
+    AS $$
+BEGIN
+  NEW."note_id_convert_to_bigint" := NEW."note_id";
+  RETURN NEW;
+END;
+$$;
+
 CREATE FUNCTION trigger_17c3a95ee58a() RETURNS trigger
     LANGUAGE plpgsql
     AS $$
@@ -23814,7 +23823,8 @@ CREATE TABLE vulnerability_user_mentions (
     note_id integer,
     mentioned_users_ids integer[],
     mentioned_projects_ids integer[],
-    mentioned_groups_ids integer[]
+    mentioned_groups_ids integer[],
+    note_id_convert_to_bigint bigint
 );
 
 CREATE SEQUENCE vulnerability_user_mentions_id_seq
@@ -33715,6 +33725,8 @@ CREATE TRIGGER nullify_merge_request_metrics_build_data_on_update BEFORE UPDATE
 
 CREATE TRIGGER projects_loose_fk_trigger AFTER DELETE ON projects REFERENCING OLD TABLE AS old_table FOR EACH STATEMENT EXECUTE FUNCTION insert_into_loose_foreign_keys_deleted_records();
 
+CREATE TRIGGER trigger_0e214b8a14f2 BEFORE INSERT OR UPDATE ON vulnerability_user_mentions FOR EACH ROW EXECUTE FUNCTION trigger_0e214b8a14f2();
+
 CREATE TRIGGER trigger_17c3a95ee58a BEFORE INSERT OR UPDATE ON commit_user_mentions FOR EACH ROW EXECUTE FUNCTION trigger_17c3a95ee58a();
 
 CREATE TRIGGER trigger_1a857e8db6cd BEFORE INSERT OR UPDATE ON vulnerability_occurrences FOR EACH ROW EXECUTE FUNCTION trigger_1a857e8db6cd();
diff --git a/ee/app/models/vulnerability_user_mention.rb b/ee/app/models/vulnerability_user_mention.rb
index 7a1207d47c78f6049d0bedace56fe7de6cbfde55..ddbda230724c34e0e68e42db31822747481010fd 100644
--- a/ee/app/models/vulnerability_user_mention.rb
+++ b/ee/app/models/vulnerability_user_mention.rb
@@ -1,6 +1,10 @@
 # frozen_string_literal: true
 
 class VulnerabilityUserMention < UserMention
+  include IgnorableColumns
+
+  ignore_column :note_id_convert_to_bigint, remove_with: '16.0', remove_after: '2023-05-22'
+
   belongs_to :vulnerability
   belongs_to :note
 end