Ipad and Smart Keyboard

I have an iPad Pro 2017 12" that my daughter gave me and its Smart Keyboard. My iPad tells me that "Accessory is not supported". I don't know what to do. I have tried turning off the iPad and then reattaching the keyboard, but that doesn't work. I have also cleaned the magnetic links and that hasn't worked either. I don't know what to do. My daughter says she had no problem with it. My iPad is up to date. HELP!