Unintended disagreements occur when a parent (B) is
thinned by swapping a child (E) to another part of the
taxonomic tree, resulting in existing IDs of the parent being interpreted
as disagreements with existing IDs of the swapped child.
Identification
ID 2 of taxon E will be an unintended disagreement with ID 1 of taxon B after the taxon swap
If thinning a parent results in more than 10 unintended disagreements, you
should split the parent after swapping the child to replace existing IDs
of the parent (B) with IDs that don't disagree.
Alex, while I appreciate the fact that you cited POWO here and that there were a lot of swaps to do for this change, I think it would also be very helpful to include a link to the underlying paper if it's available. In this case I think it's Schneider (2016) Resurrection of the genus Aphyllon for New World broomrapes (Orobanche s.l., Orobanchaceae). I wish POWO did this, but they don't seem to.