diff --git a/db/update15.5.sql b/db/update15.5.sql
index 4888c9133e..9874656feb 100644
--- a/db/update15.5.sql
+++ b/db/update15.5.sql
@@ -1,2 +1,3 @@
 ALTER TABLE `zt_project` drop COLUMN `product`, drop COLUMN `statge`, drop COLUMN `storyConcept`;
 ALTER TABLE `zt_product` drop COLUMN `storyConcept`;
+UPDATE zt_todo SET assignedTo=account,assignedBy=account,assignedDate=`date` WHERE assignedTo='';