I cannot create combinations Prestashop 8.1.4

[s.ausere]

It is not possible to create products with combinations, what could be happening? Este es el error

 

Se ha producido un error inesperado. [PrestaShop\PrestaShop\Core\Exception\CoreException código 0]: Error occurred when trying to add Combination [Duplicate entry '24-1' for key 'ps_product_attribute_lang.PRIMARY'

INSERT INTO `ps_product_attribute_lang` (`id_product_attribute`, `available_now`, `available_later`, `id_lang`) VALUES ('24', '', '', '1')

 

Thanks