Hacking Upgrading/downgrading with CIA botches Native_firm?

[Amapola62]

I heard you can't restore a Nand backup to sysnand if said nand was ever upgraded with cias because it can cause a brick...the problem is that one of my 3ds was downgraded with sysupdater from 10.3 to 9.2 and the other was upgraded with sysupdater in rxtools devmode from 4.3 to 9.2...

Does that mean I can't restore the 9.2 sysnand backup i made after those downgrades/upgrades?

 

[Stephano]

I heard you can't restore a Nand backup to sysnand if said nand was ever upgraded with cias because it can cause a brick...the problem is that one of my 3ds was downgraded with sysupdater from 10.3 to 9.2 and the other was upgraded with sysupdater in rxtools devmode from 4.3 to 9.2...

Does that mean I can't restore the 9.2 sysnand backup i made after those downgrades/upgrades?

I'm not an expert on the subject, but if doing the A9LH process 6 times has told me anything , you are able to restore previous NANDs from different firmware versions. There is always a risk of it bricking however, that is why we typically restore NAND backups on EmuNAND or a A9LH SysNAND.
To hopefully be correct and to answer your question, yes you are able restore a 9.2 SysNAND backup.