You mean, you used commmand "flasher -f -F main.bin", right?
That is the safest flasher option, but unfortunately does not fix all things.

Now, there are at least 2 ways to proceed:
You can either wipe the device all clean, and lose your data, or attempt to rescue data first.
Which way to do, depends on if there is valuable data to hou in the phone.

Rescuinc is possible, but requirds knowledge.