Merging 2 series of references


I used EndNotes for referencesbuy luxury watchesina document. A collegue added his own references, but the 2 sets of references both begn at 1 (1,2,3 etc). How do I do to merge the 2 lists in a single list?


Reformating the document should fix it unless the document has been corrupted in some way, or the endnote fields unlinked for one set?  Do you have access to both libraryies?