Hacking Question Can I restore my switch with no and backup?

[Jonhgopogi]

I have an unpached switch.
I updated the firmware through daybreak from 12 to 12.0.2 and then on reboot I get the error in the photo. I have a feeling I messed up and the firmware somehow corrupted? Idk. The firmware were from a reliable source at least what everyone recommends... Also I got validation from daybreak, I tried to install at first 12.1 and 12.0.3 but didn't validate that's why 12.0.2.
Is there a fix? Also I didn't make a nand backup. Can I use the nand from my other switch?

 

[M7L7NK7]

Do a fresh atmosphere setup

 

[Jonhgopogi]

You mean formating and then install atmosphere or just deleting atmosphere folder and install?

--------------------- MERGED ---------------------------

Do a fresh atmosphere setup

Fixed. Thank you, I did it also updated the fuse .bin which I think that was the problem or both. Have a nice day