Translation:We do not know who rents our stores.
I got mine the same and was rejected as well. Some answers are simply not flexible enough.
For example: "Saya punya seorang anak yang suka makan ayam goreng." I have a kid who likes to eat fried chicken.
It can also be another way to describe a subject. "Dia punya kambing yang pendek". She has a short goat or She has a goat that is short.