Duplicate entries for parameter &1

What causes this issue?

Parameter &V1& contains records with a duplicate key.

System Response

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

How to fix this error?

Delete the records that have a duplicate key in parameter &V1&, then
call BAPI_MATERIAL_SAVEREPLICA again.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.