Nodejs pool, LMDB update - wallet substitute

[ovas]

I have a pool build on nodejs, it utilize LMDB to store shares.
One of the miners claims he lost an access to the wallet and asks me to forward all unpaid coins to his new wallet. Is there an easy way to do this?

• Would it be harmful if I just substitute all the occurrences of his old wallet address by new wallet address in mdb database file?
• If yes, can I use sed command or it is necessary to use LMDB interface for this purpose?
• Should I use ban list instead?

What are your thoughts on this?