I am making this swap because subspecies edwardsi should be edwardsii. Apparently this typo has been perpetuated in different places.
Strangely, the Reptile Database has the complete taxonomic history listed and actually uses the single i spelling. They site Baird and Girard (1853) as their source for that spelling. However, they also cite the same source as the origin of the ii spelling.
Baird, S. F. and C. Girard. 1853. Catalogue of North American Reptiles in the Museum of the Smithsonian Institution. Part 1.-Serpents. Smithsonian Inst., Washington, xvi + 172 pp. (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.