Well!
The problem keep persist! Editing the contacts on one device do not take effect of editing the data on the cloud, I think? Even if the contacts are edited on one of the devices the time when sync them on anther device the error is copied too! If I leave only one copy on one of the devices, and delete the contact list of the rest it may help, but I didn't try cos all contacts may get lost. What do you think. Thank you for the opinion!😕