network which I want to make as secure as possible, so should I do it like wenairdrop says? Enter it to hard wallet as an existing wallet, delete metamask one, create a dummy with a new seed and import the wallet address from hard wallet to metamask again?
If u feel like u need to keep the existing wallet for the reason mentioned above. If u can move ur stuff then move it and start from scratch. If u can’t then the other way will atleast get ur current seed offline
You should only do this, if you MUST have to keep the old wallet address. But the recommended approach would be to transfer everything to the new wallet address that the ledger creates.
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