[Here Barry has changed time by going back and saving his parents. And now he is losing his memory of him being the flash, and now kid flash also known as Wally West is now the new speedster saving central city. So Barry goes back in time to talk to reverse flash and ask him why his powers are fading away. so after he asked reverse flash told him that it was flashpoint, where the flash doesn’t exist. There is a new villian named alchemy, he has created a new speedster and sent him to the flash but flash defeated him. So he allowed reverse flash to kill his mum.