ref: organization cannot be None for Dashboard

src/sentry/api/serializers/rest_framework/dashboard.py

@@ -513,7 +513,7 @@ def create(self, validated_data):
         bad things will happen
         """
         self.instance = Dashboard.objects.create(
-            organization=self.context.get("organization"),
+            organization=self.context["organization"],
             title=validated_data["title"],
             created_by_id=self.context["request"].user.id,
         )