What specific evidence underlies criticism of ʿAbd al-Karīm Abū Umayyah in report 62?

Criticism of Transmitters: Misreporting, Claims of Hearing and Historical Evidence

• He added only a clarifying commentary
• He asked Ayyūb about ʿIkrimah’s report and then said, “I heard ʿIkrimah”
• He always identified the intermediary
• He admitted to Ayyūb only an error in copying a written record