i have a access database as front end, sql server as back end. But i got error message (write conflict) when user update the record.

The message is in the following:
Write conflict

this record has been changed by another user since you started editing it. If you save the record, you will overwrite the chagnes the orther user made.

Copying the changes to the clipboard will let you look at the values the other usre entered, and then paste your changes back in if you decide to make changes.

And also we have no other user update this record. Any body can help, Thanks.