try copying the 6.1.1 normal files from github page onto sd card. then delete the config bin in luma folder. then do this
Use the (A) button and the D-Pad to turn on the following:
"Autoboot SysNAND"
"Use SysNAND FIRM if booting with R (A9LH)"
"Show current NAND in System Settings"
"Show GBA...