Flashpoint (Earth-Prime)

"You always make all of these decisions, and then the rest of us have to deal with the fallout. Flashpoint, going into the Speed Force, taking Nora into the future..."

- Iris West-Allen

Flashpoint was an alternate timeline created by Barry Allen.

History
At some point, Barry Allen went back in time and created a Time Aberration. He then reversed the timeline creation and supposedly restored the timeline. However, damage was made to the timeline and Team Flash members were forced to deal with the fallout.