SAP Message AJ151 - Not possible to update operand &1 to the installation facts

Diagnosis
You have attempted to update values to the installation facts foroperand &v1&. A replacement value is specified in the installationfacts for operand &v1&.
It is not possible to update to an operand with areplacement value.

System Response
Processing is terminated.

Procedure
To update to the installation facts, use an operand that does not havea replacement value specified for it in the installation facts.