Neos.Media Tag class has incorrect doctrine mappings

[tvt]

Description

The Tag class has two properties, children and parent. Their relationship is incorrectly mapped and causes doctrine validation to fail.

Steps to Reproduce

1. Add Neos.Media 5.2 to a project
2. Run ./flow doctrine:validate

Expected behavior

Validation should pass.

Actual behavior

$ ./flow doctrine:validate
Mapping validation FAILED!
  Neos\Media\Domain\Model\Tag
    The field Neos\Media\Domain\Model\Tag#children is on the inverse side of a bi-directional relationship, but the specified mappedBy association on the target-entity Neos\Media\Domain\Model\Tag#parent does not contain the required 'inversedBy="children"' attribute.

Affected Versions

Neos.Media version 5.2

[albe]

cc @daniellienert

This should be easy to fix. I wonder why the mapping seems to work at runtime though?