diff --git a/server/src/database/migrations/20230721141406_alter_table_comment_thread_target_add_workspace_id/migration.sql b/server/src/database/migrations/20230721141406_alter_table_comment_thread_target_add_workspace_id/migration.sql
index bb55717a7..25e2e1abe 100644
--- a/server/src/database/migrations/20230721141406_alter_table_comment_thread_target_add_workspace_id/migration.sql
+++ b/server/src/database/migrations/20230721141406_alter_table_comment_thread_target_add_workspace_id/migration.sql
@@ -5,7 +5,7 @@
 
 */
 -- AlterTable
-ALTER TABLE "comment_thread_targets" ADD COLUMN     "workspaceId" TEXT NOT NULL;
+ALTER TABLE "comment_thread_targets" ADD COLUMN     "workspaceId" TEXT;
 
 -- AddForeignKey
 ALTER TABLE "comment_thread_targets" ADD CONSTRAINT "comment_thread_targets_workspaceId_fkey" FOREIGN KEY ("workspaceId") REFERENCES "workspaces"("id") ON DELETE RESTRICT ON UPDATE CASCADE;
diff --git a/server/src/database/schema.prisma b/server/src/database/schema.prisma
index 3fc31d1c2..c4b922939 100644
--- a/server/src/database/schema.prisma
+++ b/server/src/database/schema.prisma
@@ -384,9 +384,9 @@ model CommentThreadTarget {
   commentThread   CommentThread   @relation(fields: [commentThreadId], references: [id], onDelete: Cascade)
   commentThreadId String
   /// @TypeGraphQL.omit(input: true, output: false)
-  workspace       Workspace       @relation(fields: [workspaceId], references: [id])
+  workspace       Workspace?      @relation(fields: [workspaceId], references: [id])
   /// @TypeGraphQL.omit(input: true, output: true)
-  workspaceId     String
+  workspaceId     String?
   commentableType CommentableType
   commentableId   String