The reassignEdits.php maintenance script is used to update the performer of all edits by a given user to a different account and potentially IP address.
The script could be run with reassignEdits.php ~2024-01 1.2.3.4 --force which would reassign the edits made by a temporary account to an IP address. This would fail because actor IDs cannot be acquired for IP addresses. A more intuitive error message could be used to make it clear why the reassignment cannot happen.