Update - Parts in PDM Link

Hi all. We recently switched from Intralink to PDM Link and have a
question regarding update. I get the plus sign on a part that I=92m not
sure I=92ve modified and in Intralink I could do an update and it would
go away being replaced with the part from common space. Now with PDM
Link, I=92m working (online) within my workspace and when I do an update
(to the parts with plus), the plus sign remains and I get a message
that says (on the following screen):

Cannot update an item that is up-to-date or is the iteration already
in the workspace chosen for compatibility with other members of the
same family table that are not being updated.

We=92re kind of stumped as to whether or not we need to get rid of the
plus sign like we use to do with Intralink (doing an update).

Thanks
-Justin