User warning: Trying to overwrite a cache redirect for "entity_view:block:mycustom_breadcrumbs:[languages:language_interface]=fr:[theme]=mycustom:[url.path.is_front]=is_front.0:[user.permissions]=10a51ea2bca521584b1e9d273d7255ac4e3f03087cf4d1c8c53e33d397598a97" with one that has nothing in common, old one at address "languages:language_interface, theme, user.permissions, url.path.is_front" was pointing to "url.path.parent, route", new one points to "url". in Drupal\Core\Cache\VariationCache->set() (line 138 of core/lib/Drupal/Core/Cache/VariationCache.php).