Ctrl+shift+c in Pose mode

Finnaly I decided to switch to new blender version (2.93). First thing I did is set keymap to 2.7x in preferences. Now I’m trying to add constraint to bone but shortcut doesn’t work. Do I have to manually add constraint in new blender? Or do I have to add shortcut to keymap?
Can someone tell me WHY ctrl+shift+c doesn’t work in pose mode? It does work in object mode, but doesnt in pose mode!
It’s very frustrating.

P.S. I can imaging how many such little things changed and now hidden behind all those menus and popo-ups in new blender so I will need lot of time to make it work as it should.