diff --git a/src/main/java/org/gcube/documentstore/persistence/PersistenceBackendFactory.java b/src/main/java/org/gcube/documentstore/persistence/PersistenceBackendFactory.java
index e065c2c..f58875f 100644
--- a/src/main/java/org/gcube/documentstore/persistence/PersistenceBackendFactory.java
+++ b/src/main/java/org/gcube/documentstore/persistence/PersistenceBackendFactory.java
@@ -220,7 +220,7 @@ public abstract class PersistenceBackendFactory {
 			persistenceBackends.put(context, target);
 			
 			try {
-				actual.close();
+				actual.close(); // flush is made from close function
 			} catch (Exception e) {
 				logger.error("Error closing {} for context {} which has been substituted reset to {}.",
 						actual.getClass().getSimpleName(), context,