diff --git a/src/main/resources/META-INF/persistence.xml b/src/main/resources/META-INF/persistence.xml
index 865bbfa553a53048e8e2213ef0389fcc338dc58f..829847a8582bf2ba30d553d1ba00c0db608cd5ad 100644
--- a/src/main/resources/META-INF/persistence.xml
+++ b/src/main/resources/META-INF/persistence.xml
@@ -173,7 +173,6 @@
 		<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>