Matchcode object & is new and being processed by &

What causes this issue?

The matchcode object is being created by another user. Therefore it is
locked and only the specified user can edit the object.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

How to fix this error?

You can only edit the matchcode object once the specified user has
finished editing.

Error message extract from SAP system. Copyright SAP SE.