fix double faves

app/Http/Controllers/TableController.php

@@ -49,7 +49,12 @@ class TableController extends Controller
     public function favouriteTable(Request $request, User $user, string $table)
     {
         $tableModel = $this->resolveTable($request, $user, $table);
-        \user()->favouriteTables()->attach($tableModel);
+
+        $self = \user();
+        if (! $self->favouritesTable($tableModel)) {
+            $self->favouriteTables()->attach($tableModel);
+        }
+
         return redirect($tableModel->viewRoute);
     }