I've set up new tag groups to help organise the c300b tags we have set up. How do I move the existing tags, which are already in use, to the new tag groups?
There is no way to do this natively in Craft through the control panel.
You could either write quick plugin that programmatically moved the existing tags to new tag groups or write some custom SQL that did it directly against the database.
For the latter, it should be as simple as updating the
groupId column of the
craft_tags table with the new
groupId for the tags you want to move.