Sacramento County - STR (Airbnb) Laws

Hello, I own a duplex with two separate addresses. I intend to live in the top unit and list the lower one-bedroom unit, which has it's own address and entrance on Airbnb. However, I'm receiving pushback from the Revenue Division regarding the issuance of a short-term rental permit. They are stating that because the address I want to list on Airbnb is not my primary residence, I only qualify for a non-primary residence STR permit, which restricts rentals to a maximum of 90 days per calendar year.

Has anyone else encountered this issue before?

Thank you.