After a tiny change in the schematic (I just updated a net), re-importing changes (using _Import Changes_ button) triggered a bunch of components Add/Remove. However, these are already existing components which are already placed on the PCB. They have the same prefix than in the schematic and did not cause any re-importing issues previously. For example on the above picture, LED11-LED17 are removed and then replaced. To the best of my knowledge, I did not alter any of the components before _Import Changes_ started wanting to recreate components.   I tried to reimport older versions of PCB and schematics without success. Is this a know bug? Could it be caused by an update of EasyEDA or part libraries?