First, I would like to mention that your buddy has advised you correctly. It is recommended to check if your recovery seed backup is created correctly regularly (for example before firmware updates).
Also, if the recovery seed backup does not match the recovery seed stored in your Trezor device, you should move your funds to a new wallet (backed up with a new recovery seed). The process of how to do it can be found at Recovery seed phrase has been compromised: moving funds to a new wallet (see section “Lost your recovery seed”).
This is currently the standard message in the “Activity” tab when the desired wallet is accessed. We are aware that it is confusing for the users and will change this flow.
This message means that the recovery seed backup you checked is a valid seed but not the same one that is currently stored in your Trezor device. Is it possible that you have more recovery seed backups? For example from a SW wallets? If so, make sure to check the correct recovery seed backup.