From ca9144a4a810dd509e468699c13325d8a1f5dcb1 Mon Sep 17 00:00:00 2001
From: Mariusz Felisiak <felisiak.mariusz@gmail.com>
Date: Thu, 28 Nov 2019 11:46:08 +0100
Subject: [3.0.x] Fixed #31021 -- Fixed proxy model permissions data migration
 crash with a multiple databases setup.

Regression in 98296f86b340c8c9c968375d59f1d3a3479e60c2.

Backport of e8fcdaad5c428878d0a5d6ba820d957013f75595 from master
---
 docs/releases/2.2.8.txt | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'docs')

diff --git a/docs/releases/2.2.8.txt b/docs/releases/2.2.8.txt
index e9bd1ed1cb..4d8f9869c5 100644
--- a/docs/releases/2.2.8.txt
+++ b/docs/releases/2.2.8.txt
@@ -13,3 +13,7 @@ Bugfixes
 * Fixed a data loss possibility in the admin changelist view when a custom
   :ref:`formset's prefix <formset-prefix>` contains regular expression special
   characters, e.g. `'$'` (:ticket:`31031`).
+
+* Fixed a regression in Django 2.2.1 that caused a crash when migrating
+  permissions for proxy models with a multiple database setup if the
+  ``default`` entry was empty (:ticket:`31021`).
-- 
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