User blog comment:Gifist8/The Flash Season 2 Review/@comment-3481504-20160821030044/@comment-3423279-20160821032339

Is it their past self or them from a future which no longer exists? I can't remember which one to be honest.

Either way the Speed Force seems to be capable of accounting for past selves dying or people never being able to exist in the first place, Eddie dying should have made anything related to Eobard never happen but it still did.

The Time Wraiths seem to be made for paradoxes and the such, after the Speed Force cleans up the mess it sends them as a "stop doing that" warning if they manage to defeat it.