Index: lib/Wiki/Toolkit/Setup/MySQL.pm
===================================================================
--- lib/Wiki/Toolkit/Setup/MySQL.pm	(revision 394)
+++ lib/Wiki/Toolkit/Setup/MySQL.pm	(working copy)
@@ -31,6 +31,8 @@
   moderate  bool         NOT NULL default '0',
   PRIMARY KEY (id)
 )
+|, qq|
+CREATE UNIQUE INDEX node_name ON node (name)
 | ],
 
     content => [ qq|