diff --git a/orochi/website/admin.py b/orochi/website/admin.py
index 196d477a..f3ef4750 100644
--- a/orochi/website/admin.py
+++ b/orochi/website/admin.py
@@ -135,7 +135,7 @@ def get_form(self, request, obj=None, **kwargs):
         defaults = {}
         if obj is None:
             defaults["form"] = self.add_form
-        defaults.update(kwargs)
+        defaults |= kwargs
         return super().get_form(request, obj, **defaults)
 
 
diff --git a/orochi/website/forms.py b/orochi/website/forms.py
index 8108e7b2..a248575f 100644
--- a/orochi/website/forms.py
+++ b/orochi/website/forms.py
@@ -12,7 +12,11 @@
 )
 
 from orochi.utils.plugin_install import plugin_install
-from orochi.website.defaults import RESULT_STATUS_NOT_STARTED
+from orochi.website.defaults import (
+    DUMP_STATUS_MISSING_SYMBOLS,
+    RESULT_STATUS_DISABLED,
+    RESULT_STATUS_NOT_STARTED,
+)
 from orochi.website.models import Bookmark, Dump, Folder, Plugin, Result, UserPlugin
 
 
@@ -223,29 +227,33 @@ class Meta:
         ]
 
     def save(self, commit=True):
-        plugin = self.cleaned_data["plugin"]
-        plugin_names = plugin_install(plugin.file.path)
-        first = None
-        for plugin_data in plugin_names:
+        plugin_zip = self.cleaned_data["plugin"]
+        if plugin_names := plugin_install(plugin_zip.file.path):
+            plugin_data = plugin_names[0]
             plugin_name, plugin_class = list(plugin_data.items())[0]
-            plugin = super(PluginCreateAdminForm, self).save(commit=commit)
-            plugin.comment = plugin_class.__doc__
-            plugin.name = plugin_name
-            plugin.local = True
-            plugin.local_date = datetime.now()
-            plugin.save()
+            plugin_obj = super(PluginCreateAdminForm, self).save(commit=commit)
+            plugin_obj.comment = self.cleaned_data["comment"] or plugin_class.__doc__
+            plugin_obj.name = plugin_name
+            plugin_obj.local = True
+            plugin_obj.local_date = datetime.now()
+            plugin_obj.save()
             for user in get_user_model().objects.all():
-                UserPlugin.objects.get_or_create(user=user, plugin=plugin)
-                for dump in Dump.objects.all():
-                    if plugin.operating_system in [dump.operating_system, "Other"]:
-                        Result.objects.update_or_create(
-                            dump=dump,
-                            plugin=plugin,
-                            defaults={"result": RESULT_STATUS_NOT_STARTED},
-                        )
-            if not first:
-                first = plugin
-        return first
+                UserPlugin.objects.get_or_create(user=user, plugin__id=plugin_obj.id)
+            for dump in Dump.objects.all():
+                if plugin_obj.operating_system in [dump.operating_system, "Other"]:
+                    Result.objects.update_or_create(
+                        dump=dump,
+                        plugin__id=plugin_obj.id,
+                        defaults={
+                            "result": (
+                                RESULT_STATUS_NOT_STARTED
+                                if dump.status != DUMP_STATUS_MISSING_SYMBOLS
+                                else RESULT_STATUS_DISABLED
+                            )
+                        },
+                    )
+            self.save_m2m()
+            return plugin_obj
 
 
 class PluginEditAdminForm(FileFormMixin, forms.ModelForm):