how to flash a new firmwere when bootloader version (smg900v) and phone model (smg900f) don't match?

[AC Question]

hello!
i have a galaxy s5 with this details:
Model: SM-G900F
Device type: kltevzw
Product name: kltevzw
Manufacturing date: 2014.06.18
Mobile operator: Cellcom IL
KNOX warranty bit:

Product Code: Not Active
PDA: G900FXXU2BOK3
CSC: G900VVZW2BOK3
Baseband: G900VVRU2BOK3
Bootloader: G900VVRU2BOK3

Changelist: 4782027
Buildnumber: LRX21T.G900FXXU2BOK3
Build date: 2015. 11. 17. (화) 20:11:35 KST
Build fingerprint: Verizon/kltevzw/kltevzw:5.0/LRX21T/G900FXXU2BOK3:user/release-keys
Build description: kltevzw-user 5.0 LRX21T G900FXXU2BOK3 release-keys
Android version: 5.0
Kernel version: 3.4.0-4782027

and now - i can't use my camera (an error messege every time i try to open it), so i downloaded a stock firmwere to the model sm-g900f. tried unsuccesfully to flash it - so start learning what stucking it. anyway - is there any solution to flash a new smg900f bootloader instead of the incompatible smg900v? or - how to flash a official firmwere?
ah, also - the s5 is already rooted.
thanks!