Because it's the same snake...?
Anyway. Yours is most likely going to end up as lesser/butter or lesser/butter and Mojave if it was a pet store.
If you breed to a lesser fire you'll end up with a mix of whatever genes are in the BEL in every hatchling. Those hatchlings might also end up as BEL, Fire BEL and whatever the genes are + fire.
Unless the BEL is actually a BlkEL. Lol. But that's a different can of worms.