«كَمُرَّةَ بْنِ كَعْبٍ وَكَعْبِ بْنِ مُرَّةَ»
For example, Murrah ibn Kaʿb and Kaʿb ibn Murrah.
When a person's name is exchanged with his father's, the result may wrongly identify the transmitter or make two distinct people appear interchangeable. In narrator criticism, a small alteration to genealogy may change whether the claimed teacher or student relationship is historically plausible.
Critical practice: Compare the full names, kunyas, genealogies, known teachers and pupils, and independent routes. This can establish whether a name has been transposed in one chain.
This is an error of name order and identity, not a general synonym for adding or omitting a narrator.