You cannot change one field from an AutoNumber data type and add another AutoNumber field at the same time.@Do the following: ...

You cannot change one field from an AutoNumber data type and add another AutoNumber field at the same time.@Do the following:
1. Delete the AutoNumber field you just added, click the File tab, and then click Save.
2.  Add the new AutoNumber field, and then save the table again.@@1@@@0