Have you made the Ratlines invisible?  Also check the Update Record: **What's new in v6.3.39** 2020.04.21 Important Notice * **Before v6.3.39, update PCB is made through the component prefix, at now, it is made through the component unique ID now. After opening the old document for the first time, the editor reassign the component ID based on the component prefix** * **If the old schematic pages contain subparts(such as U1.1, U1.2 combine as a U1), the component need to be manually moved back to the original location after the first Update PCB** * **Before modify the old projects, suggest to create a new version for it, then edit the new version. Via: project list - project folder - right-click menu - version** * **Do not edit your design less than v6.3.39, if your design have been saving at v6.3.39, otherwise, it will appear footprint offset issue after Import Changes**

Or hidden the nets in the Design Manager? 

Thank you! Yes, Ratlines really were invisible. I've fix it.