SAP Message RP068 - Do not enter an account number or bank code for payment method &

Diagnosis
You have specified a method of payment which does not require theentry of an account or bank number.

System Response
The system cannot store this combination of data.werden.

Procedure
Check that you have entered the correct method of payment. If so,delete the account/bank number entries. If you have entered a payeekey instead, delete this.