diff --git a/booking.variety_admin.inc b/booking.variety_admin.inc
index 2411926..b03f9a2 100644
--- a/booking.variety_admin.inc
+++ b/booking.variety_admin.inc
@@ -395,7 +395,7 @@ function booking_varietysessions_csv_report($timeslot_id) {
     ->condition($db_and)
     ->fields('v')
     ->execute()
-    ->fetchAllAssoc();
+    ->fetchAllAssoc('vid');
 
   watchdog('booking_debug', 'booking_varietysessions_csv_report variety sessions: <pre>@info</pre>', array('@info' => print_r( $variety_sessions, true)));
 /*