User blog comment:FairyRaven/Fairy Tail Chapter 365: Fairy in the Jail!, Review and Commentary/@comment-7418318-20131229075039/@comment-7418318-20131229180858

He also mentioned that ever since the Zentopian incident there are hardly any Celestial Spirit Mages left.

While he doesn't explicitly says so, it does make on think that the decline of the CSM is at least in part due to this incident.

So even though the actual happenings might be different, there are at least some parallels there.