Safemove 2 Basic - Controller Failed To Load Config (4 Axis Robot)

Using robotstudio 2025.2.1 on an omnicore controller with safe move basic. If i configure a 6 axis robot with a safety config and load it into a real or virtual controller it works. Using exactly the same work method but this time using a scara robot the the config downloads to the controller (both real and virtual) but when the controller reboots the "Controller failed to load safety configuration, default configuration was loaded instead". Is this a problem with robot studio? Can anyone help? I've got a cell with 5 scaras and two 6 axis robots and safemove only works in the six axis 'bots.