Used Ruckus 650 wont disconnect from old controllers setting .

[rmholt87]

I recently acquired several used Ruckus R650 access points and am trying to reset them for use on my personal network. I have performed hard resets using the reset button and also powered them on with a power cord while connecting them directly to my computer for configuration. However, once they are connected to a network, they erase the settings I applied and revert back to their previous controller configuration, which locks me out. I have also attempted a standalone firmware update, but that was unsuccessful as well. How do I permanently detach them from the previous controllers power?