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app/Http/Controllers/Admin/TeacherController.php

@@ -134,7 +134,7 @@ class TeacherController extends Controller
 
         $data = $request->input('data');
 
-        $tmp = $this->where([
+        $tmp = $this->model->where([
             ['phone', '=', $data['phone']],
             ['id', '<>', $request->input('id')],
         ])->first();