diff --git a/jans-orm/sql/src/main/java/io/jans/orm/sql/impl/SqlEntryManager.java b/jans-orm/sql/src/main/java/io/jans/orm/sql/impl/SqlEntryManager.java
index 4f3df45ead1..b6690e229a9 100644
--- a/jans-orm/sql/src/main/java/io/jans/orm/sql/impl/SqlEntryManager.java
+++ b/jans-orm/sql/src/main/java/io/jans/orm/sql/impl/SqlEntryManager.java
@@ -209,7 +209,7 @@ protected void persist(String dn, String[] objectClasses, List<AttributeData> at
             resultAttributes.add(new AttributeData(SqlOperationService.DN, dn));
             resultAttributes.add(new AttributeData(SqlOperationService.DOC_ID, parsedKey.getKey()));
 
-            boolean result = getOperationService().addEntry(parsedKey.getKey(), getBaseObjectClass(objectClasses), resultAttributes);
+            boolean result = getOperationService().addEntry(parsedKey.getKey(), getBaseObjectClassForDataOperation(objectClasses), resultAttributes);
             if (!result) {
                 throw new EntryPersistenceException(String.format("Failed to persist entry: '%s'", dn));
             }
@@ -266,7 +266,7 @@ public void merge(String dn, String[] objectClasses, List<AttributeDataModificat
             }
 
             if (modifications.size() > 0) {
-                boolean result = getOperationService().updateEntry(toSQLKey(dn).getKey(), getBaseObjectClass(objectClasses), modifications);
+                boolean result = getOperationService().updateEntry(toSQLKey(dn).getKey(), getBaseObjectClassForDataOperation(objectClasses), modifications);
                 if (!result) {
                     throw new EntryPersistenceException(String.format("Failed to update entry: '%s'", dn));
                 }
@@ -988,6 +988,14 @@ protected boolean isSupportForceUpdate() {
 		return true;
 	}
 
+	private String getBaseObjectClassForDataOperation(String[] objectClasses) {
+		if (ArrayHelper.isNotEmpty(objectClasses) && objectClasses.length > 0) {
+			throw new MappingException("SQL ORM supports only one OC!");
+		}
+		
+		return getBaseObjectClass(objectClasses);
+	}
+
 	private String getBaseObjectClass(String[] objectClasses) {
 		if (ArrayHelper.isEmpty(objectClasses)) {
 			throw new MappingException("Object class isn't defined!");