How to downgrade (Borderlands 3)

the people came as an 18 lvlom (Amara) in the model mode the circle of carnage and a gun my character apnulsya from 18 to 53 and put 35 skill points, I don't want so help pliz how to return your LVL, (only has presepialis their mother, there is only saving 15 hours ago), I want to pump myself doprejte the plot and everything to open, and then LVL lifted and what is now held to these quests when they are all for the 15-20лвла