MappingException: Class Doctrine\ODM\PHPCR\ReferrersCollection is not a valid document or mapped super class.

reported by nacmartin https://github.com/symfony-cmf/symfony-cmf/issues/131

Since this property was introduced

https://github.com/symfony-cmf/symfony-cmf/blob/master/src/Symfony/Cmf/Bundle/ContentBundle/Document/StaticContent.php#L44

I have this error when persisting this kind of document in SAB:

MappingException: Class Doctrine\ODM\PHPCR\ReferrersCollection is not a valid document or mapped super class.

Any clue?

=> phpcr-odm should not try to persist a ReferrersCollection. this is just the inverse of the Reference annotation. as this is directional in phpcr, the ReferrersCollection should be immutable by the client.