Material already maintained for this transaction/event
Message type: E = Error
Message class: M3 - Material Master
Message number: 307
Message text: Material already maintained for this transaction/event
What causes this issue?
The material master record already exists for the chosen view or
organizational level.
How to fix this error?
Check your entries and, if necessary, correct them. Alternatively,
call up the material master record in Change mode.
Error message extract from SAP system. Copyright SAP SE.
