There are multiple concepts for the alias name &1

What causes this issue?

There are several concepts for this alias name.

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

System Response

At runtime one of the concepts is displayed arbitrarily. When the
concepts are maintained, the concept that was created in the current
system is displayed.

How to fix this error?

Either delete the concepts that you do not need, or change the
alias name (transaction SOTR_EDIT).

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.