Prunella hastifolia is a controversial taxa. POWO considers Prunella hastifolia and Prunella grandiflora subsp. pyrenaica as synonym of Prunella grandiflora.
In Spain and in Portugual "hastifolia/pyrenaica" is include in Prunella grandiflora variability.

But in France it's still listed as Prunella hastifolia and europlusmed.org list Prunella hastifolia as Prunella grandiflora subsp. pyrenaica.

Considering there's no clear consensus for this taxa, merging P. hastifolia into P. grandiflora subsp. pyrenaica but keep subsp. pyrenaica is the best consensus to prevent loss of data.

https://inpn.mnhn.fr/espece/cd_nom/115994?lg=en
http://www.floraiberica.es/floraiberica/texto/pdfs/12_140_30_Prunella.pdf