Could landlords not renew leases during Covid-19?

[Jane Z.]

I have a tenant who has been living in one of our SFR properties since 1/2013. She used to be a section 8 tenant, but lost section 8 status at the end of last year because her son is over 18 years old. Also at the end of last year, she signed a six-month lease because at that time she was thinking about buying a home. I don't really like this tenant because we have to remind her of paying rent frequently even though eventually she paid all her rent. But for the last several months, she was only be able to pay her rent partially due to Covid-19 and I have told her that is OK as long as she will pay back later.

Her lease will end on 6/30. It is very likely she wants to renew the lease. But I don't want to renew. Instead I plan to forgo her rent owed and keep her security deposit, which is still less than the rent owed. Do you think landlords must renew leases during Covid-19? We just had a SFR rented out very quickly. So I don't think finding new tenants is an issue.