Inherited tenant lease

[Susan Beard]

Hello, everyone!

We just purchased our first duplex, to live in one side and rent the other. We have a long-term, month-to-month tenant in the other side who is an on-time payer and good renter. She last signed a lease with the previous owner in 2018. Now that we own the property, do we need to have her sign a new lease, in our names, or what is done with a month-to-month tenant? I live in Texas.