diff --git a/sql/mysql/install/structure.sql b/sql/mysql/install/structure.sql
index 0a1ba74..d8b6c42 100644
--- a/sql/mysql/install/structure.sql
+++ b/sql/mysql/install/structure.sql
@@ -686,11 +686,11 @@ CREATE TABLE units_organisations_link (
 
 CREATE TABLE upgrades (
   id int(10) unsigned NOT NULL default '0',
-  descriptor char(40) NOT NULL default '',
+  descriptor char(100) NOT NULL default '',
   description char(255) NOT NULL default '',
   date_performed datetime NOT NULL default '0000-00-00 00:00:00',
   result tinyint(4) NOT NULL default '0',
-  parent char(40) default NULL,
+  parent char(100) default NULL,
   PRIMARY KEY  (id),
   KEY descriptor (descriptor),
   KEY parent (parent)
diff --git a/sql/mysql/upgrade/2.0.6/create_upgrade_table.sql b/sql/mysql/upgrade/2.0.6/create_upgrade_table.sql
index 29ef822..d624358 100644
--- a/sql/mysql/upgrade/2.0.6/create_upgrade_table.sql
+++ b/sql/mysql/upgrade/2.0.6/create_upgrade_table.sql
@@ -4,7 +4,7 @@ CREATE TABLE upgrades (
   description char(255) NOT NULL default '',
   date_performed datetime NOT NULL default '0000-00-00 00:00:00',
   result tinyint(4) NOT NULL default '0',
-  parent char(40) default NULL,
+  parent char(100) default NULL,
   PRIMARY KEY  (id),
   KEY descriptor (descriptor),
   KEY parent (parent)