My multi-signature wallet is a 3/4 structure. Now I only have one valid signing address. The private keys of other addresses were accidentally lost due to computer upgrade. How can I restore the account and add a new signer to replace the original lost signer address? It is very urgent. Thank you.
Unfortunately, if you do not have access to a threshold of signers, or already have another recovery mechanism setup (such as the Safe{RecoveryHub}), then it is possible that you have lost access to those funds.
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