I would restart.
That mart bug is warp related, and the patch is for the same fire red version you patched before.
I don't know if it's the squirrels rom, I wish I could compare the file I made the patch for and squirrels to see if they're one in the same.
Edit: tested it out, it appears they are one in the same.
Edit 2: Found another game breaking bug, but I fixed it and updated the patch.