Rear camber not moving

[ik1015]

Rear upper control arm (camber) is not moving while turning eccentric bolt.
What should I replace or inspect? replace only Eccentric bolt or else. Easy DIY to replace them and appreciate for any tips!
Thanks for help!

 

[ik1015]

No one? Eccentric bolt is turning but there is no movement of upper control arm to adjust camber?

 

[ik1015]

What should I try and replace 1st? Eccentric screw? or need replace upper control arms?
Only driver side has problem and passenger side works fine.

 

[ik1015]

No one knows?