You could, but why not use BIP85 it’ll do what you want w/0 deleting your current, essentially having multiple seeds on one device
Discussion
this is what im trying to decide between, I have been pretty careless with regards to privacy and pretty much all my sats are kyc, meaning that i have a lot of compromised addresses on the main derivation from my seed. Contemplating whether i should just change the "account number" on the coldcard and use that but then that main derivation will always be compromised so maybe just start fresh?
Up to you really, it shouldn’t compromise the wallet unless you given out the seed phrase, you can essentially just use the accounts to have a kyc wallet and non kyc wallet on the device