From 8b45d49883fc4c1ff1f1bce4b75114a2de95743c Mon Sep 17 00:00:00 2001
From: Julian Rother <julianr@fsmpi.rwth-aachen.de>
Date: Tue, 11 Oct 2016 15:58:56 +0200
Subject: [PATCH] Allow NULL values for value_old in changelog

---
 db_schema.sql | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/db_schema.sql b/db_schema.sql
index 06b5c08..dca9248 100644
--- a/db_schema.sql
+++ b/db_schema.sql
@@ -24,7 +24,7 @@ CREATE TABLE IF NOT EXISTS `changelog` (
   `id_key` varchar(64) NOT NULL,
   `id_value` text NOT NULL,
   `field` varchar(255) NOT NULL,
-  `value_old` text NOT NULL,
+  `value_old` text,
   `value_new` text NOT NULL,
   `executed` text NOT NULL
 );
-- 
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