Dollar Tree

I walked in the door and the Manager (Teresa) told me that I needed to leave my back pack at the front. I told her that it is my purse. It is a purse that is made like a back pack. I purchased it at Wal-Mart. She told me that I could leave. She's never treated me that way before and she has seen me several times entering the store with this same purse until yesterday. She's even checked me out and I had the same purse and she never said anything. I am a frequent customer.