Pelham, J. (2016, March 11). A Catalogue of the Butterflies of the United States and Canada by Jonathan P. Pelham. Retrieved June 3, 2016, from http://butterfliesofamerica.com/US-Can-Cat.htm
(Link)
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.
As the California naturalist Allan Schoenherr likes to say "I use common names: they change less often".