hibernate/hibernate-orm · error · UnsupportedOperationException

Could not create many-to-many foreign-key : %s

Error message

Could not create many-to-many foreign-key : %s

What it means

Error "Could not create many-to-many foreign-key : %s" thrown in hibernate/hibernate-orm.

Source

Thrown at hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/ManyToManyCollectionPart.java:654

			);
		}

		if ( fkTargetModelPart instanceof EmbeddableValuedModelPart embeddableValuedModelPart ) {
			return MappingModelCreationHelper.buildEmbeddableForeignKeyDescriptor(
					propertyPath,
					embeddableValuedModelPart,
					fkBootDescriptorSource,
					findContainingEntityMapping(),
					getCollectionDescriptor().getAttributeMapping(),
					null,
					false,
					fkBootDescriptorSource.getColumnInsertability(),
					fkBootDescriptorSource.getColumnUpdateability(),
					creationProcess
			);
		}

		throw new UnsupportedOperationException(
				"Could not create many-to-many foreign-key : " + getNavigableRole().getFullPath()
		);
	}

	private ForeignKeyDescriptor determineForeignKey(
			ForeignKeyDescriptor foreignKeyDescriptor,
			Value fkBootDescriptorSource,
			@Nullable String propertyPath,
			MappingModelCreationProcess creationProcess) {
		final int selectableCount = foreignKeyDescriptor.getJdbcTypeCount();
		final var keyPart = foreignKeyDescriptor.getKeyPart();
		for ( int i = 0; i < selectableCount; i++ ) {
			final var selectable = keyPart.getSelectable( i );
			if ( selectable.isInsertable() != fkBootDescriptorSource.isColumnInsertable( i )
				|| selectable.isUpdateable() != fkBootDescriptorSource.isColumnUpdateable( i ) ) {
				final var attributeMapping = keyPart.asAttributeMapping();
				final var declaringType =
						attributeMapping == null ? null : attributeMapping.getDeclaringType();

View on GitHub (pinned to fad1729dce)

Solutions

1. Check the many-to-many join table mapping: join columns and inverse join columns must reference existing columns of the join table.
2. Verify the target entity of the many-to-many is correctly mapped.

When it happens

Trigger: Thrown when constructing the foreign key descriptor for a many-to-many collection fails because the key mappings are inconsistent.

Common situations: See trigger scenarios.

AI-assisted analysis of hibernate/hibernate-orm@fad1729dce (2026-08-22). Data as JSON: /api/errors/d0f8d65498e4e010. Report an issue: GitHub.