Viola scotophylla Jordan (and consequently V. alba subsp. scotophylla) is listed as a synonym of V. alba subsp. alba in POWO (https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:869223-1).
According to the latest studies V. alba 'scotophylla' is just a morphotype with presence of anthocyanins (Marcussen T., 2003. Evolution, phylogeography, and taxonomy within the Viola alba complex (Violaceae). Plant Systematics and Evolution, 237: 51-74).
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.
Viola scotophylla Jordan (and consequently V. alba subsp. scotophylla) is listed as a synonym of V. alba subsp. alba in POWO (https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:869223-1).
According to the latest studies V. alba 'scotophylla' is just a morphotype with presence of anthocyanins (Marcussen T., 2003. Evolution, phylogeography, and taxonomy within the Viola alba complex (Violaceae). Plant Systematics and Evolution, 237: 51-74).