The Microsoft Access database engine stopped the process because you and another user are attempting to change the same data at the same time. (Error 3197)
This error can occur in a multiuser environment.
Another user has changed the data you are trying to update. This error can occur when multiple users open a table or create a Recordset and use optimistic locking. Between the time you used the Edit method and the Update method, another user changed the same data.
To overwrite the other user's changes with your own, execute the Update method again.