The imported Excel file contains the duplicate rule with ID &1.

What causes this issue?

The imported Excel file contains the duplicate rule with ID&V1&.

System Response

This causes an error that prevents the rule import.

How to fix this error?

Please open the Excel file on your desktop and make sure that the rule
with ID &V1& is only contained once. Afterwards, create another import
and upload the corrected Excel file.

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.