Ware, J.L., E. Pilgrim, M.L. May, T.W. Donnelly, and K. Tennessen. 2016. Phylogenetic relationships of North American Gomphidae and their close relatives. Systematic Entomology. DOI: 10.1111/syen.12218 (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.