Two completely separate networks with same SSID

I have inherited a campus that has a Cisco AP network and controller, and a Ubiquiti AP network and controller.
They both broadcast the same SSID and overlap each other in a totally unplanned and random way.. I believe it is the cause of many users devices disconnecting and reconnecting continuously. If I rename the SSID of the opposing Network to a different SSID will it help eliminate this?