What change is initially reported about the student in report 68?

Reports of ʿAmr ibn ʿUbayd: Attribution, Conflicting Accounts and Evidence of Criticism

• He began attending ʿAmr after studying with Ayyūb
• He ascribed what he heard from ʿAmr to Ayyūb
• He denied hearing from Ayyūb and sought authorization from ʿAmr
• He submitted a written criticism of Ayyūb’s account