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.
Juncus trifidus L. is listed as a synonym of Oreojuncus trifidus (L.) Drábková & Kirschner in POWO (https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:77135599-1).