Not making this change and accepting the taxon as a Cephalocereus would be disastrous as it is the type species of Pilosocereus. Pilosocereus would become a synonym of Cephalocereus!
POWO and Lode both accept this as a Pilosocereus.
Pedro, do you have a reference for the study you referred to?
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.
Not making this change and accepting the taxon as a Cephalocereus would be disastrous as it is the type species of Pilosocereus. Pilosocereus would become a synonym of Cephalocereus!
POWO and Lode both accept this as a Pilosocereus.
Pedro, do you have a reference for the study you referred to?