M. Catherine Aime, Lisa A. Castlebury, Mehrdad Abbasi, Dominik Begerow, Reinhard Berndt, Roland Kirschner, Ludmila Marvanová ,Yoshitaka Ono, Mahajabeen Padamsee, Markus Scholler, Marco Thines, and Amy Y. Rossman. (2018) Competing sexual and asexual generic names in Pucciniomycotina and Ustilaginomycotina (Basidiomycota) and recommendations for use. IMA FUNGUS 9(1): 75–89. (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.