Recently we released multiple ad group support in our ad engine. This automatically splits keywords into different ad groups according to their match type (all Exact together, all Phrase together and all Broad together). This allows the campaigns to have more keywords and has a few other benefits. As part of this change, the old ad groups have been archived.
There shouldn't be any negative effects from this, but if you still have concerns, feel free to reach out to us on chat to discuss your specific situation.