error upgrading firmware version

i am upgrading firmware version for my InfiniHost III EX MT 25208 card from 4.6.2 to 4.8.200 .

on command :

"mstflint -d 10:00.0 -i fw-25208-4_8_200-MHEL-CF128-T.bin bmstflint -d 10:00.0 -i fw-25208-4_8_200-MHEL-CF128-T.bin "

it gives error :

Current FW version on flash:  N/A

    New FW version:               N/A

Read and verify Invariant Sector            - DIFF DETECTED

Invariant sector mismatch. Address 0x27c  in image: 0x23000094, while on flash: 0x20000094

The invariant sector can not be burnt in a failsafe manner.

You can perform the FW update without burning the invariant sector by

by specifying the -skip_is flag.

See FW release notes for details on invariant sector updates.

-E- Failsafe burn error: Invariant sector mismatch

IS IT SAFE TO TRY WITH  -skip_is  OR  wat is the fix

Thanks