Can I generate a new backup seed if I decided to wipe my trezor model t ?
Of course you can.
You can even record the wallet address generated by the backup seed in case you need to transfer assets urgently.
However, it is recommended that you remember the seeds you are using and the seeds you are not using. Someone just mistakenly restores the wallet with an unused seed, thinking that their assets are gone. Then said in the forum that there is a problem with the recovery of the trezor. He later discovered his own mistake.