diff --git a/src/main/java/org/gcube/accounting/datamodel/BasicUsageRecord.java b/src/main/java/org/gcube/accounting/datamodel/BasicUsageRecord.java
index 93d5825..f12fe4a 100644
--- a/src/main/java/org/gcube/accounting/datamodel/BasicUsageRecord.java
+++ b/src/main/java/org/gcube/accounting/datamodel/BasicUsageRecord.java
@@ -142,6 +142,7 @@ public abstract class BasicUsageRecord implements UsageRecord, Serializable {
 		Set<Field> fields = getAllFields(this.getClass());
 		
 		for(Field field : fields){
+			boolean defaultAccessibility = field.isAccessible();
 			field.setAccessible(true);
 			String keyString;
 			try {
@@ -172,6 +173,7 @@ public abstract class BasicUsageRecord implements UsageRecord, Serializable {
 					computedFields.add(keyString);
 				}
 			}
+			field.setAccessible(defaultAccessibility);
 		}
 		logger.trace("Required Fields {}", requiredFields);
 		logger.trace("Aggregated Fields {}", aggregatedFields);