Strange problem i have for 4-5 mame version update...

I use merged roms and whatever i try to do to correct it ...
No luck :) I also use Yori Yoshizuki Dat's (must try hand made dat maybe ...)

Trouble is :
Gauntlet Legends (version 1.2) [folder: gauntl12 - parent: gauntleg - size: 544kb]
wrong merged ROM set: E:\Emul\Arcade\Mame32\roms\gauntl12 (merge to: gauntleg)

I tried to delete gauntleg and gauntl12 roms and rebuild them ...
No luck as cmpro keep puting the offending legend12.bin on the gauntleg zip ...

Any idea ?