Created attachment 901752 [details] [test plan]Admin delete a plan, system will go to 500 error page. Description of problem: as subject. Version-Release number of selected component (if applicable): v3.8.8-1 on devel server. How reproducible: 100% Steps to Reproduce: 1.Admin login tcms. 2.Click 'Admin-Test Plans' link to enter test plan list page. 3.Choose one of test plan, click link on test plan name to enter plan page. 4.Click delete btn, then confirm delete action. Actual results: system go to 500 error page. while the plan has been deleted. Expected results: system go back to plan list page. Additional info:
the above issue also happened when delete version in admin site.