From 16af8622e6856bf60c98937ae78884ba98782d44 Mon Sep 17 00:00:00 2001
From: johnmikep <45859899+johnmikep@users.noreply.github.com>
Date: Thu, 9 Jul 2020 10:16:22 -0500
Subject: [PATCH] Update utils.py

---
 server/utils.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/server/utils.py b/server/utils.py
index f79b16b2..4d1e050a 100644
--- a/server/utils.py
+++ b/server/utils.py
@@ -540,7 +540,8 @@ def get_active_and_inactive_plugins(plugin_kind='machines'):
 def unique_plugin_order(plugin_type='machines'):
     model = PLUGIN_MODELS[plugin_type][0]
     try:
-        id_max = model.objects.aggregate(Max('order'))['order__max']
+        # Return 0 if no machine plugins exist
+        id_max = model.objects.aggregate(Max('order'))['order__max'] or 0
     except KeyError:
         id_max = 0
     return id_max + 1