diff --git a/src/main/resources/META-INF/persistence.xml b/src/main/resources/META-INF/persistence.xml
index 540b607e2ba64a230c3b88d00a657a782a081444..973add4e4a321ed62c3ec31683b69f289a3b9164 100644
--- a/src/main/resources/META-INF/persistence.xml
+++ b/src/main/resources/META-INF/persistence.xml
@@ -154,7 +154,6 @@
 		<class>org.olat.modules.qpool.model.BusinessGroupToItemView</class>
 		<class>org.olat.modules.qpool.model.ResourceShareImpl</class>
 		<class>org.olat.modules.qpool.model.TaxonomyLevelImpl</class>
-		<class>org.olat.modules.qpool.model.ResourceShareImpl</class>
 		<class>org.olat.modules.qpool.model.ItemCollectionImpl</class>
 		<class>org.olat.modules.qpool.model.CollectionToItem</class>
 		<class>org.olat.modules.qpool.model.QEducationalContext</class>