I changed some of the net names in the schematic, without changing any net connectivity. Then I update the changes to the PCB. All the tracks associated with the nets that I made the name changes are labeled as error. The tracks are fixed with the original net name, which are different from the names of the pads that they are now connecting. This is very annoying! Physically, there is no problem with the tracks at all, but I just have to delete them and reroute them to eliminate the errors. The program should automatically update the net names of the tracks if all the pads that they are connected to are renamed. If there is any inconsistency among the points that the tracks are connected to, the tracks should be automatically deleted upon the design update. This is a common feature for pretty much every decent PCB design software.