The person who originally sent the broken transactions deleted his wallet
Sigh... why delete a wallet instead of moving it aside and keeping the old copy just in case?
You should never delete a wallet.For sure he has a backup. Somewhere...
Probably, but if he died without telling anyone about it, then they may have been deleted or destroyed by whomever gained control of his things.
it could also be that his backup is screwed too, witouth necessarily being deleted
btw the only reason for not deleting a wallet that you know could not receive any transaction, would be hoping in a chance of collision