Same problem with:
Prunus domestica subsp. prisca (needs to have Prunus domestica subsp. domestica added as the accepted name)
Prunus nachichevanica (now a synonym of Prunus cerasifera)
Prunus persica var. nucipersica is now just Prunus persica
Armeniaca armeniaca and Armeniaca vulgaris are now synonyms of Prunus armeniaca, but I am unable to add them as it is a parent plant and does not have that option.