How To Fix V4009 - The customer no. in the sched.agreement differs from the one selected

SAP Error Message - Details

• Message type: E = Error

• Message class: V4 - Nachrichten Verkauf (Variable Meldungen und EDI-Meldungen)

• Message number: 009

• Message text: The customer no. in the sched.agreement differs from the one selected

What causes this issue?

The customer number entered in the selection does not agree with the
customer number in the <DS:GLOS.scheduling_agreement>scheduling
agreement</>.

System Response

The system does not allow the selection or generates a warning message.

How to fix this error?

Please compare the customer number you entered in the selection with
the number in the scheduling agreement. You may be processing the wrong
scheduling agreement.

Error message extract from SAP system. Copyright SAP SE.