'Cow's Tongue, A Garden Form', The Cactus Explorer Number 22 Joseph Shaw, Nancy Hussey, David J Ferguson, September 2018
ISSN 2048-0482
http://www.cactusexplorers.org.uk/Explorer22/Cactus%20Explorer%2022_complete.pdf
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.