How to have duplicate node names?

1052366798

So basically I have a character and a pants, and I want all their bones to have the same names so that when I export them to ue4, I can use a single skeleton asset. Then I tried to set "node name" and set both node names for character and pants "root". However, after exporting, one of them become "root_dup_2". So is their a way to give them same node name in daz?