U-boot running BBT create code in every reset

Hi,

Our board is based on Freescale P2041RDB. We're using same nand chip as that of the RDB. However we're facing a problem during nand erase/write/read command.
On every reset when we issue these commands u-boot can't find bbt and it starts to create it. Only difference between P2041RDB & our board is we've lowered down the eLBC clock frequency. BBT will be created every time or just once?
What if we remove NAND_BBT_CREATE option from bbt_main_descr & bbt_mirror_descr?

Thanks,
Madhur.