Fixes #6117 - clean usergroup cache
Dependent destroy was missing on through association from user side.
(cherry picked from commit 5db9d35307e6d8ce6e4558a8a554e526be729b8f)
Fixes #6117 - clean usergroup cache
Dependent destroy was missing on through association from user side.
(cherry picked from commit 5db9d35307e6d8ce6e4558a8a554e526be729b8f)