I doubt it will be that simple. Will gonna remove the game from my account. This is the Warning message.I'll say save twice while offline, before going online.
We don't know what they track or check.
Maybe they compare the block 1 save and block 2 backup, and see that a Pokemon popped out of nowhere with no trades nor catching nor hatching.
I'm personally wondering if anyone without the initial game sync, get's stopped from doing so..
You likely need to start over with a new game save.
**Note that it says the game can be linked to a DIFFERENT account. Probably cant be linked again to my account.