Unable to merge different trading partner in item master.

Summary:

Unable to merge different trading partner in item master.

Content (required):

I am unable to merge manufacturer under item trading partner in item master as there is no option to add merged relationship trading partners.

requirement is to add 2 different manufacturers in item master, but those 2 manufacturers are merged and same i want to define in oracle fusion. I can see no options has given other than preferred, alternate or obsolete.

Earlier i have defined two different manufacturers in item master and now these 2 manufacturers had merger with each other but in fusion i have no such option to merge or define such relationship between them.