I modded my switch and mine is unpatched erista.
I'm using emummc only so I'm not get banned.
My hos and emummc is both 18.0.0 firmware version.
When I play some games which has leaderboards(like watermelon game) error code 2123-0011 pops up.
But if I press OK then I can still continue the game...
If you don't have right knowledge of cfw. Then don't update
And unfortunately there is a possibility that u could be banned.
If you did that on emummc then probably it would be fine but from what I see, you are on sysmmc so.. gl