what do I do if I just found out I have an Eviction and I told the landlord that I wanted my name off the lease

Hello, I was living with a room mate that was not paying his part of the bill. I told the land lard that I wanted my name off the lease. the mgr said told me OK, she will take it off....So I moved out and my room mate, stayed living in the unit.... now I just looked at my credit report and seen that their was a Eviction. what shell I do?