Klever

When the tag set is modified (a tag is added or removed), it seems the all associated marks should be modified respectively. Now Klever handles the action in a very strange way. The associated marks are not changed, all tag sets in marks are the same, except the first one, which is changed directly. But on the main page with all information about tags the new tags are appeared, but the old ones are still there. Thus, there are links to the same error trace from the old tag and from the new one for every associated traces (not from the first one).