diff --git a/demos/react-supabase-todolist-optional-sync/src/library/powersync/AppSchema.ts b/demos/react-supabase-todolist-optional-sync/src/library/powersync/AppSchema.ts
index cf1db063..c7485e43 100644
--- a/demos/react-supabase-todolist-optional-sync/src/library/powersync/AppSchema.ts
+++ b/demos/react-supabase-todolist-optional-sync/src/library/powersync/AppSchema.ts
@@ -90,12 +90,17 @@ export async function switchToSyncedSchema(db: AbstractPowerSyncDatabase, userId
   await db.writeTransaction(async (tx) => {
     // Copy local-only data to the sync-enabled views.
     // This records each operation in the upload queue.
+    // Overwrites the local-only owner_id value with the logged-in user's id.
     await tx.execute(
       'INSERT INTO lists(id, name, created_at, owner_id) SELECT id, name, created_at, ? FROM inactive_local_lists',
       [userId]
     );
 
-    await tx.execute('INSERT INTO todos SELECT * FROM inactive_local_todos');
+    // Overwrites the local-only created_by value with the logged-in user's id.
+    await tx.execute(
+      'INSERT INTO todos(id, list_id, created_at, completed_at, description, completed, created_by) SELECT id, list_id, created_at, completed_at, description, completed, ? FROM inactive_local_todos',
+      [userId]
+    );
 
     // Delete the local-only data.
     await tx.execute('DELETE FROM inactive_local_todos');