hibernate/hibernate-ogm — pull request #405 by DavideD (2014-11-13 11:29:55+00:00)
Title: OGM-646 NullPonter with unidirectional one-to-many associations in MongoDB

https://hibernate.atlassian.net/browse/OGM-646

in removeAssociaiton(...), associationContext.getEntityTuple() return null causing a NullPointerException