When Group is marking as inactive, check open tickets

Server-Side Components/Business Rules/When Group is making inactive/Code.js

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+(function executeRule(current, previous /*null when async*/) {
+
+    // Run only when group is being inactivated
+    if (current.active.changes() && current.active == false) {
+
+        var openTicketCount = 0;
+
+        // List of task tables to check
+        var taskTables = ['incident', 'problem', 'change_request'];
+
+        for (var i = 0; i < taskTables.length; i++) {
+            var gr = new GlideRecord(taskTables[i]);
+            gr.addQuery('assignment_group', current.sys_id);
+            gr.addQuery('active', true);
+            gr.query();
+            if (gr.hasNext()) {
+                openTicketCount++;
+                break; // We found at least one open ticket, no need to continue
+            }
+        }
+
+        // If open tickets exist, stop the update
+        if (openTicketCount > 0) {
+            gs.addErrorMessage('Cannot deactivate "' + current.name + 
+                '" group, because there are open tickets assigned to it.');
+            current.setAbortAction(true);
+        }
+    }
+
+})(current, previous);

Server-Side Components/Business Rules/When Group is making inactive/ReadMe.md

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+When marking a group as inactive, verify that there are no open tickets assigned to it from 'incident', 'problem', 'change_request' tables. If any open tickets are found, abort the deactivation process.