diff --git a/mesh/mesh-config-json.c b/mesh/mesh-config-json.c
index 7362112..ce7058b 100644
--- a/mesh/mesh-config-json.c
+++ b/mesh/mesh-config-json.c
@@ -105,7 +105,7 @@ static bool get_int(json_object *jobj, const char *keyword, int *value)
 	return true;
 }
 
-static bool add_u64_value(json_object *jobject, const char *desc,
+static bool add_u64_value(json_object *jobj, const char *desc,
 					const uint8_t u64[8])
 {
 	json_object *jstring;
@@ -116,11 +116,12 @@ static bool add_u64_value(json_object *jobject, const char *desc,
 	if (!jstring)
 		return false;
 
-	json_object_object_add(jobject, desc, jstring);
+	json_object_object_del(jobj, desc);
+	json_object_object_add(jobj, desc, jstring);
 	return true;
 }
 
-static bool add_key_value(json_object *jobject, const char *desc,
+static bool add_key_value(json_object *jobj, const char *desc,
 					const uint8_t key[16])
 {
 	json_object *jstring;
@@ -131,7 +132,8 @@ static bool add_key_value(json_object *jobject, const char *desc,
 	if (!jstring)
 		return false;
 
-	json_object_object_add(jobject, desc, jstring);
+	json_object_object_del(jobj, desc);
+	json_object_object_add(jobj, desc, jstring);
 	return true;
 }
 
@@ -1398,6 +1400,7 @@ static bool write_uint16_hex(json_object *jobj, const char *desc,
 	if (!jstring)
 		return false;
 
+	json_object_object_del(jobj, desc);
 	json_object_object_add(jobj, desc, jstring);
 	return true;
 }
@@ -1412,21 +1415,21 @@ static bool write_uint32_hex(json_object *jobj, const char *desc, uint32_t val)
 	if (!jstring)
 		return false;
 
+	json_object_object_del(jobj, desc);
 	json_object_object_add(jobj, desc, jstring);
 	return true;
 }
 
-static bool write_int(json_object *jobj, const char *keyword, int val)
+static bool write_int(json_object *jobj, const char *desc, int val)
 {
 	json_object *jvalue;
 
-	json_object_object_del(jobj, keyword);
-
 	jvalue = json_object_new_int(val);
 	if (!jvalue)
 		return false;
 
-	json_object_object_add(jobj, keyword, jvalue);
+	json_object_object_del(jobj, desc);
+	json_object_object_add(jobj, desc, jvalue);
 	return true;
 }
 
@@ -1442,7 +1445,7 @@ static const char *mode_to_string(int mode)
 	}
 }
 
-static bool write_mode(json_object *jobj, const char *keyword, int value)
+static bool write_mode(json_object *jobj, const char *desc, int value)
 {
 	json_object *jstring;
 
@@ -1451,7 +1454,8 @@ static bool write_mode(json_object *jobj, const char *keyword, int value)
 	if (!jstring)
 		return false;
 
-	json_object_object_add(jobj, keyword, jstring);
+	json_object_object_del(jobj, desc);
+	json_object_object_add(jobj, desc, jstring);
 
 	return true;
 }