BO4 - Delete object from universe

Hi,

Using bo4 sp08 and we would like to remove 3 objects from universe

Get message affect universe, business layer, incompatible items.

Whilst I can understand will affect existing reports i.e. if report uses object will get syntax error in columns where report used.

Can I just check safe in all respects apart from this to delete an object from a universe.

Using IDT unx universe.

Thanks