See https://support.office.com/en-us/article/access-does-not-recognize-the-identity-column-in-a-linked-sql-server-table-ae418bbf-2658-453a-82f1-7e043812d60d

Please fix it in a timely manner or at least provide a workaround (e.g. some VBA code that we can use to fix the broken tabledef schemas).