Value &1 could not be copied

What causes this issue?

In a characteristic, the values have to be different from the
descriptions of other values.

System Response

A value is not copied from the global to the overwritten characteristic
if the value is identical to a description of a value in the overwritten
characteristic.

How to fix this error?

Check the descriptions of the values in the overwritten characteristic
in all languages. If needed, change them manually. After having changed
the description try again to copy the value.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.