Then you should move your TRX out of Guarda Wallet and into a new wallet. Importing a private key or mnemonic into a hot wallet is a security risk anyways and it should only be done to restore your funds and then move them out.

Unless I’m missing something, you still seem to have access to your funds on Guarda Wallet, so there was no reason to import the key into another hot wallet. You should have just created a new seed in Trust and transferred your funds directly if that is the wallet you wanted to switch to.