CAUSE&
The data could not be saved. It is possible that the record you wantedto save has either been changed or deleted by another user in themeantime. (Data is only locked when you edit data in the detail screen.For this reason, the data displayed in the list may not be up-to-date.)

Procedure
Choose 'Cancel' and 'Refresh'. The most up-to-date data is thendisplayed, and you can then edit the data.