Fukushima, C. S. & Bertani, R. (2017). Taxonomic revision and cladistic analysis of Avicularia Lamarck, 1818 (Araneae, Theraphosidae, Aviculariinae) with description of three new aviculariine genera. ZooKeys 659: 1-185, Suppl. 1-5. doi:10.3897/zookeys.659.10717
World Spider Catalog (2018). World Spider Catalog. Version 19.5. Natural History Museum Bern, online at http://wsc.nmbe.ch, accessed on {date of access}. doi: 10.24436/2 (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.
This was a solid synonymy and I discuss it on a couple of the records now in the output taxon.