Created attachment 775765 [details] DB and Tomcat logs Description of problem: I have registered very outdated system into satellite multiple times and when I have accessed systems Install page, I got ISE which I'm unable to reproduce now. Maybe satellite was just recalculating ErrataCache (it was, system was still shown as with 0 applicable erratas), maybe something else. Anyway I got and ISE. Version-Release number of selected component (if applicable): spacewalk-backend-1.9.46-23.el6sat.noarch spacewalk-java-1.9.83-46.el6sat.noarch How reproducible: I have seen it for the first time and was not able to reproduce Steps to Reproduce: 1. Register outdated system (or more of them) to satellite with synced base channel with many erratas 2. While ErrataCache taskomatic task is in progress, go to: <system_details> -> Software -> Packages -> Install Actual results: ISE Expected results: Should work or nice error message should appear.