diff --git a/assets/schema/dbgpt.sql b/assets/schema/dbgpt.sql
index f2b3cdbb2..8bdee4755 100644
--- a/assets/schema/dbgpt.sql
+++ b/assets/schema/dbgpt.sql
@@ -295,7 +295,7 @@ CREATE TABLE `dbgpt_serve_flow` (
   `uid` varchar(128) NOT NULL COMMENT 'Unique id',
   `dag_id` varchar(128) DEFAULT NULL COMMENT 'DAG id',
   `name` varchar(128) DEFAULT NULL COMMENT 'Flow name',
-  `flow_data` text COMMENT 'Flow data, JSON format',
+  `flow_data` longtext COMMENT 'Flow data, JSON format',
   `user_name` varchar(128) DEFAULT NULL COMMENT 'User name',
   `sys_code` varchar(128) DEFAULT NULL COMMENT 'System code',
   `gmt_created` datetime DEFAULT NULL COMMENT 'Record creation time',
diff --git a/assets/schema/upgrade/v0_7_1/upgrade_to_v0.7.1.sql b/assets/schema/upgrade/v0_7_1/upgrade_to_v0.7.1.sql
index 7d1d4b7e7..27422eeea 100644
--- a/assets/schema/upgrade/v0_7_1/upgrade_to_v0.7.1.sql
+++ b/assets/schema/upgrade/v0_7_1/upgrade_to_v0.7.1.sql
@@ -4,3 +4,6 @@ USE dbgpt;
 -- Change message_detail column type from text to longtext in chat_history_message table
 ALTER TABLE `gpts_messages`
     MODIFY COLUMN `action_report` longtext COMMENT 'Current conversation action report';
+
+ALTER TABLE `dbgpt_serve_flow`
+    MODIFY COLUMN `flow_data` longtext null COMMENT 'Flow data, JSON format';
\ No newline at end of file
diff --git a/assets/schema/upgrade/v0_7_1/v0.7.0.sql b/assets/schema/upgrade/v0_7_1/v0.7.0.sql
index ec6e0ebba..2a8058a1c 100644
--- a/assets/schema/upgrade/v0_7_1/v0.7.0.sql
+++ b/assets/schema/upgrade/v0_7_1/v0.7.0.sql
@@ -294,7 +294,7 @@ CREATE TABLE `dbgpt_serve_flow` (
   `uid` varchar(128) NOT NULL COMMENT 'Unique id',
   `dag_id` varchar(128) DEFAULT NULL COMMENT 'DAG id',
   `name` varchar(128) DEFAULT NULL COMMENT 'Flow name',
-  `flow_data` text COMMENT 'Flow data, JSON format',
+  `flow_data` longtext COMMENT 'Flow data, JSON format',
   `user_name` varchar(128) DEFAULT NULL COMMENT 'User name',
   `sys_code` varchar(128) DEFAULT NULL COMMENT 'System code',
   `gmt_created` datetime DEFAULT NULL COMMENT 'Record creation time',