A collection with cascade="all-delete-orphan" was no longer referenced by the owning entity instance

On a fresh install I get this error every time I try to perform a database operation(login, save settings, delete user…).

Oopsy! Something went wrong!Event: contentbox-admin:settings.save

Routed URL: cbadmin/settings/save/
Layout: N/A (Module: )
View: N/A
Timestamp: 05/26/2017 09:53:45 AM