Invalid SQL generated for mutation when using association with @NotFound

Encountered an issue with many-to-one associations and @NotFound when migrating to Spring Boot 3. Incomplete SQL is generated for update and delete statements.

For example, having two entities, user:

And comments:

And following HQL/JPQL statements:

• SELECT c FROM Comment c WHERE c.user = :user

• UPDATE Comment c SET c.text = :text WHERE c.user = :user

• DELETE FROM Comment c WHERE c.user = :user

Selects are working and generate correct SQL - select ... from comments c1_0 left join users u1_0 on u1_0.id=c1_0.user_id where u1_0.id=?. However update and delete statements are incomplete (the join part is not included), resulting in invalid SQL - delete from comments where u1_0.id=?.

When @NotFound is removed from the association then all examples work, the SQL is generated same way as in Hibernate 5, without join - delete from comments where user_id=?.

Test case reproducing these examples - , it contains tests for Hibernate 5 and 6, the update/delete ones are failing in Hibernate 6, but working in 5.

I see that there are similar issues:

Seems like this provides a bit different use case and simpler test case how to reproduce the issue, so decided to create a separate issue.