Rhino8 duplicate material problem

I have a new problem with material duplication in Rhino8. Previously it was always possible to duplicate an existing material and then change the texture. Now in Rhino8 the materials are always connected in some way and all textures always change together, rather than just the new one. I can’t find a way to disconnet the materials and to create a completely new texture every time is really bad for the workflow.
You can see the blue line that shows the connection of the materials in the screenshot.
material connected
Pleease help :slight_smile: