Thursday, April 30, 2026 ¶ Today a bug in Lino Prima took me a few hours to hunt and fix. Look at this code: class Challenge ( Sequenced ):: def get_siblings ( self ): if self . exam_id : return self . __class__ . objects . filter ( exam = self . exam ) return self . __class__ . objects . filter ( project_section = self . project_section ) Above code is bad. Below is the corrected code: def…