William Rosenquist Burns ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5a7b38f... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiMjJmODA1ODZk... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16033?atlOrigin=eyJpIjoiMjJmOD... ) HHH-16033 ( https://hibernate.atlassian.net/browse/HHH-16033?atlOrigin=eyJpIjoiMjJmOD... ) Many-to-Many inverse mapping referencing the same class uses pk instead of fk field for removal ( https://hibernate.atlassian.net/browse/HHH-16033?atlOrigin=eyJpIjoiMjJmOD... ) Issue Type: Bug Affects Versions: 6.2.0.CR1 Assignee: Unassigned Components: hibernate-core Created: 12/Jan/2023 08:17 AM Priority: Major Reporter: William Rosenquist Burns ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5a7b38f... ) While updating Infinispan 2LC to use Hibernate 6.2.0 from 6.0.2 we found a regression with how many to many mappings do a removal. It seems to be trying to use the primary key identifier instead of the foreign key field. This is a problem for a test as the primary key is a Long and the foreign key is a String. This causes a ClassCastException when it tries to remove any many-to-many mappings that may exist. <bag name="bagOfItems" inverse="true" table="items_otheritems"> <key column="other_item_id"/> <many-to-many class="Item" property-ref="name" column="item_name" /> </bag> This mapping is the underlying cause. The test just creates an entity in one session, then in a second loads it and removes it, quite simple. PR will be attached after. ( https://hibernate.atlassian.net/browse/HHH-16033#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16033#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#100214- sha1:b03f6a4 )