From 07dd6e554eccae30a27b2d04ac5aadc0680b7625 Mon Sep 17 00:00:00 2001
From: Steve Pulec <spulec@gmail.com>
Date: Thu, 5 Mar 2015 19:32:02 -0500
Subject: [PATCH] [S3]Only add multipart part_id to partlist if it is not
 already in there. Closes #324.

---
 moto/s3/models.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/moto/s3/models.py b/moto/s3/models.py
index fd41125ed..6c7788e7a 100644
--- a/moto/s3/models.py
+++ b/moto/s3/models.py
@@ -152,7 +152,8 @@ class FakeMultipart(object):
 
         key = FakeKey(part_id, value)
         self.parts[part_id] = key
-        insort(self.partlist, part_id)
+        if part_id not in self.partlist:
+            insort(self.partlist, part_id)
         return key
 
     def list_parts(self):