Hello, I am the facet-analyser maintainer/upstream (support) If fact the conflict comes from
facet-analyser -> libinsighttoolkit5-dev -> lib-vtk9-dev -> python3-vtk9 facet analyser which is a PV plugins depends also on paraview-dev. facet-analyser -> paraview-dev -> conflict with python3-vtk9 the missing piece is or parview built with the system vtk9 (glop glop) or a libinsighttoolkit5-pvX.YY-dev build against the vtk of paraview... (pas glop) cheers Frederic