Can I import wallet words more than once?
If you are sure the old wallet has not been compromised, you can use the old BIP39 seed again. The seed represents the private key that stores your coins so using it once does not make it invalid since the point is to be able to recover your coins with just the seed.

On the other hand, it shouldn't be too hard to generate a new BIP39 seed that you can use and be sure isn't compromised.