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Description
Symfony version(s) affected: 4.4.9
Description
I'm using a childAdmin with Sonata
https://symfony.com/doc/master/bundles/SonataAdminBundle/reference/child_admin.html
When I'm on a playList/idPlaylist/video/create url and try to submit the form to create a video and add it to the playlist, I get Unable to get a property on a non-object..
Everything worked fined with symfony-form@4.4.8, but when I update to 4.4.9 I get an error.
Additional context
