diff --git a/database_updates.php b/database_updates.php
index 2e4949de..dba6bcfe 100644
--- a/database_updates.php
+++ b/database_updates.php
@@ -1508,8 +1508,9 @@ if (LATEST_DATABASE_VERSION > CURRENT_DATABASE_VERSION) {
 
     if (CURRENT_DATABASE_VERSION == '0.9.6') {
         // Insert queries here required to update to DB version 0.9.7
-        mysqli_query($mysqli, "ALTER TABLE `tickets` ADD `ticket_invoice_id` INT(11) NULL DEFAULT NULL AFTER `ticket_asset_id`");
+        mysqli_query($mysqli, "ALTER TABLE `tickets` ADD `ticket_invoice_id` INT(11) NOT NULL DEFAULT 0 AFTER `ticket_asset_id`");
         mysqli_query($mysqli, "ALTER TABLE `tickets` ADD `ticket_billable` TINYINT(1) NOT NULL DEFAULT 0 AFTER `ticket_status`");
+        //set all invoice id
         // Then, update the database to the next sequential version
         mysqli_query($mysqli, "UPDATE `settings` SET `config_current_database_version` = '0.9.7'");
     }