diff --git a/lib/db_ido/hostdbobject.cpp b/lib/db_ido/hostdbobject.cpp
index 70fcb6ecd..8ad6fa993 100644
--- a/lib/db_ido/hostdbobject.cpp
+++ b/lib/db_ido/hostdbobject.cpp
@@ -251,6 +251,7 @@ void HostDbObject::OnConfigUpdate(void)
 				Dictionary::Ptr fields_contact = boost::make_shared<Dictionary>();
 				fields_contact->Set("host_id", DbValue::FromObjectInsertID(host));
 				fields_contact->Set("contact_object_id", user);
+				fields_contact->Set("instance_id", 0); /* DbConnection class fills in real ID */
 
 				DbQuery query_contact;
 				query_contact.Table = GetType()->GetTable() + "_contacts";
@@ -270,6 +271,7 @@ void HostDbObject::OnConfigUpdate(void)
 				Dictionary::Ptr fields_contact = boost::make_shared<Dictionary>();
 				fields_contact->Set("host_id", DbValue::FromObjectInsertID(host));
 				fields_contact->Set("contactgroup_object_id", usergroup);
+				fields_contact->Set("instance_id", 0); /* DbConnection class fills in real ID */
 
 				DbQuery query_contact;
 				query_contact.Table = GetType()->GetTable() + "_contactgroups";
diff --git a/lib/db_ido/servicedbobject.cpp b/lib/db_ido/servicedbobject.cpp
index acbe80649..c997df1b6 100644
--- a/lib/db_ido/servicedbobject.cpp
+++ b/lib/db_ido/servicedbobject.cpp
@@ -248,6 +248,7 @@ void ServiceDbObject::OnConfigUpdate(void)
 			Dictionary::Ptr fields_contact = boost::make_shared<Dictionary>();
 			fields_contact->Set("service_id", DbValue::FromObjectInsertID(service));
 			fields_contact->Set("contact_object_id", user);
+			fields_contact->Set("instance_id", 0); /* DbConnection class fills in real ID */
 
 			DbQuery query_contact;
 			query_contact.Table = GetType()->GetTable() + "_contacts";
@@ -267,6 +268,7 @@ void ServiceDbObject::OnConfigUpdate(void)
 			Dictionary::Ptr fields_contact = boost::make_shared<Dictionary>();
 			fields_contact->Set("service_id", DbValue::FromObjectInsertID(service));
 			fields_contact->Set("contactgroup_object_id", usergroup);
+			fields_contact->Set("instance_id", 0); /* DbConnection class fills in real ID */
 
 			DbQuery query_contact;
 			query_contact.Table = GetType()->GetTable() + "_contactgroups";