h1. Observed behaviour
* Entity has a Version field of type Long.
* New instance gets persisted.
* Instance is modified and merge is attempted with a null version field.
* Hibernate does not complain about missing null version. Instead the entity is treated as transient, although it exists in the database, leading to unexpected results.
h1. Expected behaviour
* When attempting to merge a persisted and detached entity with a null version, Hibernate either throws an exception or fetches the latest version from the database. |
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