Fatal error: Uncaught Symfony\Component\Debug\Exception\FatalThrowableError: Call to a member function getId() on null in /home/users/default/public_html/releases/190118075035/live/src/AppBundle/Entity/Variation.php:614 Stack trace: #0 /home/users/default/public_html/releases/190118075035/live/vendor/twig/twig/lib/Twig/Extension/Core.php(1619): AppBundle\Entity\Variation->getGroupingSiblings() #1 /home/users/default/public_html/releases/190118075035/live/var/cache/prod/twig/8e/8e03937567e55443306f6997735d087ce2ff98a8c5b809ea9ff415aa852f8fe3.php(281): twig_get_attribute(Object(Twig_Environment), Object(Twig_Source), Object(AppBundle\Entity\Variation), 'groupingSibling...', Array) #2 /home/users/default/public_html/releases/190118075035/live/vendor/twig/twig/lib/Twig/Template.php(189): __TwigTemplate_2c648feb61310921f4ef361fb9676c86a8de08891f3f914f8ed2c98d813145f0->block_content(Array, Array) #3 /home/users/default/public_html/releases/190118075035/live/var/cache/prod/twig/cd/cd74da12bf8591933431c2e07d9baa843e5757db641a56dc in /home/users/default/public_html/releases/190118075035/live/src/AppBundle/Entity/Variation.php on line 614