That's why Spanish Constitutional Court tore down articles of the Catalan Estatut (sort of regional constitution) that are accepted in exactly the same terms for others and are even covered in the Spanish Constitution.
E.g. "Catalonia is a nation". The Spanish Constitution says "Catalonia is a nationality" while the Andalusian Estatuto says "Andalusia is a nation".
E.g. "Catalonia is a nation". The Spanish Constitution says "Catalonia is a nationality" while the Andalusian Estatuto says "Andalusia is a nation".