'The Design Mode requires a valid Qt kit' -error with 5.15 target examples/projects

There are some Qt5 examples (IVI System, C++ Demo Project, Thermostat Demo, Washing Machine, Effect Demo, Virtual Keyboard) that seem to be Qt5 targeted and will give 'The Design Mode requires a valid Qt kit' -error when opened with latest QDS4.2 snapshot (Qt5 Kit removed).

Target Qt version 5.15 is also still available in project wizard and creating a project with that target, will give same error.

Should we just remove Qt5.15 target from the project wizard and remove or update examples to Qt6?