Markus Heiden ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *commented* on HHH-16286 ( https://hibernate.atlassian.net/browse/HHH-16286?atlOrigin=eyJpIjoiZTczZW... ) Re: NullPointerException: Cannot invoke "EntityInitializer.getNavigablePath()" because "firstEntityInitializer" is null ( https://hibernate.atlassian.net/browse/HHH-16286?atlOrigin=eyJpIjoiZTczZW... ) @Yoann We do not use composite IDs. So I assume that this is not related. The only advanced features in play are `@Embeddable` (without IDs, but used as elements in `@ElementCollection`) and `@Inheritance(strategy = SINGLE_TABLE)`. I still struggle to extract a minimal reproducer from our project. ( https://hibernate.atlassian.net/browse/HHH-16286#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16286#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100225- sha1:4a1ccf9 )