update

app/Http/Controllers/Admin/CourseContentController.php

@@ -324,6 +324,13 @@ class CourseContentController extends BaseController
                     ];
                     $teacher = Teacher::updateOrCreate($where, $data);
                     $item['teacher_id'] = $teacher->id;
+                } else {
+                    $teacher = Teacher::find($item['teacher_id']);
+                    $teacher->name = $item['teacher_name'];
+                    $teacher->mobile = $item['mobile'];
+                    $teacher->introduce = $item['teacher_introduce'];
+                    $teacher->sex = $item['sex'];
+                    $teacher->save();
                 }
                 CourseContent::create($item);
             }