Cannot edit a record in Sales order - update table (SalesParmTable).

Dear All,

While posting the sales order invoice we are getting the below mentioned issue:

"

Cannot edit a record in Sales order - update table (SalesParmTable).
An update conflict occurred due to another user process deleting the record or changing one or more fields in the record"

Can any give the root cause and solution for this issue.

Thanks in advance for your reply at the earliest.

Best Regards

Syed