Closed on a property in march- 3-unit fully occupied. They were all midway through their leases which were transferred over, new leases were not signed. I just gave a tenant 60-day notice that I was raising rent as her lease ends 8/30/21. She informed me that she has been there 3 years and needed to notify her 90-days prior. I was aware of the 90-day period but was not aware she had been there for that length of time. Do I have any options, it is not feasible to allow her to renew the old lease as it is $400/month under market. I would be ok extending her lease an additional month if that is a legal option. Thanks in advance!