Doors NG ReqIF import

 As two seperate company and databases we are using Door NG. One of them is Doors NG 5.0.2 and the other is Doors NG 6.0.1. We have imported (by ReqIF) one module from other company Doors database to our company and established links in our database. Other company has made some changes (modification/insertion/deletion) on this module. If we import this module on top of our linked modules, do I lose all links and is there any problem importing same module for Doors NG?