diff --git a/osm_lcm/ns.py b/osm_lcm/ns.py
index 17a892d..852cc54 100644
--- a/osm_lcm/ns.py
+++ b/osm_lcm/ns.py
@@ -2344,7 +2344,9 @@
                     kdur_list = []
                     for kdur in vnfr["kdur"]:
                         if kdur.get("additionalParams"):
-                            kdur["additionalParams"] = json.loads(kdur["additionalParams"])
+                            kdur["additionalParams"] = json.loads(
+                                kdur["additionalParams"]
+                            )
                         kdur_list.append(kdur)
                     vnfr["kdur"] = kdur_list
 
@@ -2542,8 +2544,8 @@
                         )
                         deploy_params_kdu = {"OSM": get_osm_params(db_vnfr)}
                         if kdur.get("additionalParams"):
-                            deploy_params_kdu = parse_yaml_strings(
-                                kdur["additionalParams"]
+                            deploy_params_kdu.update(
+                                parse_yaml_strings(kdur["additionalParams"].copy())
                             )
 
                         self._deploy_n2vc(
@@ -4895,7 +4897,9 @@
                     kdur_list = []
                     for kdur in db_vnfr["kdur"]:
                         if kdur.get("additionalParams"):
-                            kdur["additionalParams"] = json.loads(kdur["additionalParams"])
+                            kdur["additionalParams"] = json.loads(
+                                kdur["additionalParams"]
+                            )
                         kdur_list.append(kdur)
                     db_vnfr["kdur"] = kdur_list
                 step = "Getting vnfd from database"