|  |  | @@ -124,6 +124,10 @@ def maintenance_update(request): | 
            
            
              | 124 | 124 |      # 新增 `back_tracking_number` 之后,更新维修状态 | 
            
            
              | 125 | 125 |      if not old_back_tracking_number and back_tracking_number: | 
            
            
              | 126 | 126 |          maintenance.maintenance_status = MaintenaceInfo.TRACKING_FIXED_BACK | 
            
            
              |  | 127 | +        maintenance_status_at = maintenance.maintenance_status_at | 
            
            
              |  | 128 | +        maintenance_status_at[MaintenaceInfo.TRACKING_FIXED_BACK] = tc.utc_datetime() | 
            
            
              |  | 129 | +        maintenance.maintenance_status_at = maintenance.maintenance_status_at | 
            
            
              |  | 130 | +        maintenance_status_update_sendtemplatemessage(maintenance) | 
            
            
              | 127 | 131 |   | 
            
            
              | 128 | 132 |      if name: | 
            
            
              | 129 | 133 |          maintenance.name = name |