This error can come up in various areas of Medisoft. It seems to refer to the MWTRN data table (tblpayment, etc).
To resolve, try turning off auditing in the Program Options. Open Medisoft, click on 'File' at the top and select 'Program Options'. Click on the Audit tab and uncheck all boxes.If auditing is needed, a professional may need to clear audit tables manually and re-enable auditing.