No. Account migration is required only once.
If you have already completed the migration successfully, you do not need to migrate again.
You can continue using the new BookWalker store normally with your migrated account.
If you are unsure whether migration was completed, please try signing in to the new store.
If you still cannot sign in, contact Customer Support.
Error: The migration code is already used or invalid.
Migrate your account using a migration code