But, besides keeping your Bitcoins safe in a hardware or software wallet, you must keep your wallet's backup key and password at a secure place. The backup key is the most important part of your wallet, it can be used to restore your wallet when something goes wrong and if you lose your wallet. You must keep this backup key in a secure place like a safe so that no one can access it except you.
I think I skipped or missed to add up a back up key to wallet
Then I suggest you create a new wallet, save the backup seed and simply move all your funds out of your old wallet and into the new one. This will prevent loss of funds and you can always restore your wallet later if you need to. It's a good practice to backup your wallet seed every time you make a new wallet.