Be careful with this. Make sure your seed is 100% correct before doing so.
I mean, you should always make sure you have multiple accurate back ups of your seed phrase, but in this case, it won't make a difference. He can't access Ledger Live anyway, and resetting Ledger Liver doesn't reset his Ledger hardware wallet or any of the apps or data stored on it.
If you don't want to reset Ledger Live just in case you have a brain wave and remember your correct password (if this is indeed the case, if not the bug described by Lucius above), then just install Ledger Live on a second hard drive, partition, user account, device, etc., and link your hardware wallet to that one too.