Board Thread:Questions and Answers/@comment-28265951-20160421125919/@comment-2112031-20180102105845

Ninja72 wrote: The Wikia Editor wrote: It's basically a stable time loop, in which the original timeline has been replaced by in which the original cause has disappeared. Perhaps Barry created a time remnant in the original timeline for some other unknown reason, perhaps fighting some other villain entirely.

This time remnant would then go on to become Savitar, travel back in time to fight against the original Barry and then inadvertently change his origin story in one that seems like a stable time loop, essentially causing the "original" Savitar to be replaced with a different one. All of this is just your personal speculation. If that was the case, they would have told us so. I'm certainly not presenting this as definitely true. It's just fun to speculate, especially since it's been established that the Arrowverse generally does not operate in accordance with the predestination paradox (i.e. the idea that every single instance of time travel has "already happened").