Can not delete Business Group from vCAC 6.0

Hello,

I have an issue, I'm trying to delete a "Business Group" from vCAC 6.0 and receive this error:

""Error deleting group AdminsGroup. There are 1 reservations and 0 blueprints that still reference this group.""

since I pretend to delete all and re-do again, I clean/delete all "Blueprints" and "reservations", and when I looking for reservation related to this "Business Group" nothing appears.

for more info, when I go to this BG and select "Group Information" takes me to some list of the reservation used by this BG, again, I delete it and not show on Infrastructure->reservations->reservations menu.

any help will be highly appreciated!!

regards.