Messages have been issued: number &

What causes this issue?

During inbound processing for the <DS:GLOS.IDoc>IDoc</>, messages have
arisen while checking material data.

System Response

The system has filed these messages in the form of an application log
with the number &V1&.

How to fix this error?

View the application log.
<DS:TRAN.MM90>Proceed</>

Error message extract from SAP system. Copyright SAP SE.