Hello,
If you want to restore to a backup, you can do so by following this video: https://www.youtube.com/watch?v=rHnUgNIJcR4&t=0s
If you don’t want to lose the notes in the card, make sure to protect them so they don’t get overwritten, see how to do so here: 🔐 Protecting Fields and Tags
Unfortunately, AnkiHub detects the same note ID and overwrites it so you can’t have duplicate notes. There might be a way through other addons to do this
You can however move all the AnkiHub notes in a separate deck, you can see how to do that here: It says my AnKing deck was installed, but I can't see the new deck