Cannot remove disconnected server
Mid 2014 15" Retina MBP running Catalina 10.15.7
A technician from my old workplace connected me to their local server. This server is only accessible to devices also connected to the workplace's Wifi. I no longer work there and although I've cleared Recent Servers, I'm still getting the following warning message pop up several times a day. How do I stop my MBP trying to connect to it?