Multiple control room presets

I’m using Cubase 10.5 pro, version 1-.5.2-, Build 179. Over time the Control Room presets self populate - today I have over 150 presets, most of which are ‘Cub105A’ or ‘Default’. Cubase seems to generate them itself. I’ve attached a screenshot. I have culled the surplus ones, leaving just 7, but they repopulate over time. As you can’t select several and delete them, it’s time consuming. I notice that a project doesn’t always reload the correct configuration, and I have to manually select the preset I want. Any idea how to stop this behaviour?