I created a String Custom Field in Payments with a required field attribute and added it to the grid view of payments module. I then added the field to create payment page and after adding a string to the field, when saving the payment I get error >>

'Cannot insert the value NULL into column 'DIRECTION_C', table 'SplendidCRMImport.dbo.PAYMENTS_CSTM'; column does not allow nulls. INSERT fails. The statement has been terminated.'