Hi!, maybe is atopic but.. i don't know. this is my problem:

i create a field many2many in a page of products, and then i click on the top button says "more" and then click in duplicate, all fine in this point, the action do all you expect. but when i erase some lines in the many2many fiel in the copy register also affect the original register...Why!!!??

if u  have any suggesting please help me...and sorry for the bad english