Originally Posted by
Lee
After Flashpoint, the history of the DC Universe was altered and became the New 52.
In the New 52 Flash #1, Barry had been operating as the Flash for a few years. Flash #0 showed his updated origin.
In Rebirth and the new Titans series, it was revealed that Wally West was active as Kid Flash in the years between Flash #0 and Flash #1, but Abra Kadabra trapped him in the timestream and made the world forget he ever existed.