diff --git a/skeema/gradido_community/transactions.sql b/skeema/gradido_community/transactions.sql
index ad1c960de..392ea2e5e 100644
--- a/skeema/gradido_community/transactions.sql
+++ b/skeema/gradido_community/transactions.sql
@@ -2,7 +2,7 @@ CREATE TABLE `transactions` (
   `id` bigint(20) NOT NULL AUTO_INCREMENT,
   `state_group_id` int(11) DEFAULT NULL,
   `transaction_type_id` int(11) NOT NULL,
-  `tx_hash` binary(32) NOT NULL,
+  `tx_hash` binary(32) DEFAULT NULL,
   `memo` varchar(255) COLLATE utf8_bin NOT NULL,
   `received` timestamp NOT NULL DEFAULT current_timestamp() ON UPDATE current_timestamp(),
   PRIMARY KEY (`id`)