System status - disabled/deleted fields on Smart Groups (5.24)
After upgrading a couple more installs both produced these system status messages linked to phantom smart groups. To clear them click the left of the 2 small icons, then click the smart group criteria to go into advanced search. Then it really doesn't matter what you set this search to, as after clicking search you then go ahead &amp; create the phantom smart group &amp; then delete it. The message will then disappear.  This is the same process you would use to deal with this error message where the smart group exists, but for those you simply update the smart group after the advanced search.