If both cases have archives, the script will delete the old archive, copy its entries to the new one while leaving a note to check the old one for attribution, and create a redirect on the old archive title.
This is bad, because the old archive should not have been deleted for attribution purposes.
See https://en.wikipedia.org/w/index.php?title=Special:Log&page=Wikipedia%3ASockpuppet+investigations%2FTahanido%2FArchive
If both cases have archives, the script will delete the old archive, copy its entries to the new one while leaving a note to check the old one for attribution, and create a redirect on the old archive title.
This is bad, because the old archive should not have been deleted for attribution purposes.
See https://en.wikipedia.org/w/index.php?title=Special:Log&page=Wikipedia%3ASockpuppet+investigations%2FTahanido%2FArchive