diff --git a/webtools/bugzilla/checksetup.pl b/webtools/bugzilla/checksetup.pl
index f0a7a3d7748..fc8f471f4bc 100755
--- a/webtools/bugzilla/checksetup.pl
+++ b/webtools/bugzilla/checksetup.pl
@@ -735,8 +735,9 @@ $table{fielddefs} =
 
 $table{versions} =
    'value tinytext,
-    program varchar(64)';
+    program varchar(64) not null,
 
+    unique(program)';
 
 $table{votes} =
    'who mediumint not null,