diff --git a/src/Http/Controllers/TicketingSettingsController.php b/src/Http/Controllers/TicketingSettingsController.php
index cd5720f..87dbd87 100644
--- a/src/Http/Controllers/TicketingSettingsController.php
+++ b/src/Http/Controllers/TicketingSettingsController.php
@@ -54,6 +54,15 @@ class TicketingSettingsController extends Controller
         }
     }
 
+    /**
+     * Require manager rights over one group.
+     *
+     * Deliberately NOT widened to site admins: GroupRetirementTest pins that a
+     * super admin with no agent access is refused here, and #4710 is a
+     * visibility bug, not a licence to hand every `ticketing.settings` holder
+     * manager rights over every group. Seeing a group you do not manage is the
+     * fix; acting on it is a separate decision for a human to make.
+     */
     private function requireManagerAccess(int $groupId): void
     {
         $isManager = TicketingAgentAccess::where('user_id', Auth::id())
@@ -71,14 +80,38 @@ class TicketingSettingsController extends Controller
 
         $userId = Auth::id();
         $isBootstrap = $this->isBootstrapState();
+        $isSiteAdmin = $this->isSiteAdmin();
         $myGroupIds = TicketingAgentAccess::where('user_id', $userId)->pluck('group_id');
 
+        // The groups this user may actually ACT on — requireManagerAccess() in
+        // prop form. A site admin now sees groups they do not manage (#4710),
+        // so the page has to say which rows its buttons will work on instead
+        // of offering an Edit that 403s.
+        $myManagedGroupIds = TicketingAgentAccess::where('user_id', $userId)
+            ->where('role', 'manager')
+            ->pluck('group_id');
+
+        // What this page is allowed to SHOW — separate from what it lets you
+        // DO, which stays requireManagerAccess() per group. A site admin sees
+        // every group: scoping the list to agent-access rows left an admin
+        // staring at "No groups yet. Create your first group above." with
+        // twelve groups in the database, inviting a duplicate (#4710).
+        // `null` means "no restriction".
+        //
+        // Every one of these routes sits behind `permission:ticketing.settings`
+        // and isSiteAdmin() is `is_super_admin || can('ticketing.settings')`,
+        // so today this is true for anyone who reaches the page at all. The
+        // scoped branch is kept because it is the correct behaviour if that
+        // route gate is ever loosened — it is not load-bearing right now.
+        $visibleGroupIds = $isSiteAdmin ? null : $myGroupIds;
+
         // Archived groups stay in this list — this is the one place they must
         // remain visible, so a manager can see what happened and restore it.
         // Actives first, then archived, each alphabetical.
         $groups = $isBootstrap
             ? collect()
-            : TicketingGroup::whereIn('id', $myGroupIds)
+            : TicketingGroup::when($visibleGroupIds !== null,
+                    fn($q) => $q->whereIn('id', $visibleGroupIds))
                 // tickets_count decides archive-vs-delete, so the UI can warn
                 // the operator which one their click is about to do.
                 ->withCount('tickets')
@@ -88,7 +121,10 @@ class TicketingSettingsController extends Controller
 
         $agents = $isBootstrap
             ? collect()
-            : TicketingAgentAccess::whereIn('group_id', $myGroupIds)->with('group')->get();
+            : TicketingAgentAccess::when($visibleGroupIds !== null,
+                    fn($q) => $q->whereIn('group_id', $visibleGroupIds))
+                ->with('group')
+                ->get();
 
         if ($agents->isNotEmpty()) {
             $agentUserIds = $agents->pluck('user_id')->unique();
@@ -102,13 +138,16 @@ class TicketingSettingsController extends Controller
 
         $projects = $isBootstrap
             ? collect()
-            : TicketingProject::whereIn('group_id', $myGroupIds)
+            : TicketingProject::when($visibleGroupIds !== null,
+                    fn($q) => $q->whereIn('group_id', $visibleGroupIds))
                 ->orderBy('name')
                 ->get();
 
         $emailConnections = $isBootstrap
             ? collect()
-            : EmailConnection::whereIn('group_id', $myGroupIds)->get();
+            : EmailConnection::when($visibleGroupIds !== null,
+                    fn($q) => $q->whereIn('group_id', $visibleGroupIds))
+                ->get();
 
         return Inertia::render('Ticketing/Settings', [
             'activeTab'        => $tab,
@@ -119,8 +158,9 @@ class TicketingSettingsController extends Controller
             'ticketStatuses'   => TicketStatus::orderBy('sort_order')->get(),
             'emailConnections' => $emailConnections,
             'myGroupIds'       => $myGroupIds,
+            'myManagedGroupIds' => $myManagedGroupIds,
             'isBootstrap'      => $isBootstrap,
-            'isSiteAdmin'      => $this->isSiteAdmin(),
+            'isSiteAdmin'      => $isSiteAdmin,
             'autoCloseDays'    => (int) Setting::get('ticketing.auto_close_days', 0),
             // #938 — the deploy-time repair, and how many rows it would touch. The
             // count is what turns an abstract toggle into a decision somebody can