undo the offset surfaces of a part from the axieme

[volaff]

Good evening,
I imported a part a (which presents fittings) into a set.
for my requirement I suspended the fittings in part a and taken the offset surfaces to 0 to make a series of operations in "modification component".

Now that I have done everything I would like to restore the fittings in the part to but automatically it also modifies the offset surfaces created by stacking the tree.
Is there a way to break out the surfaces compared to the original body?
thank you all,

 

[volaff]

I'll answer myself if I need anyone.
left button on the created surface...elench external references... interrupt everything