diff --git a/zh-CN/2.deployment-guide/5.prepare-metadb-and-monitordb/2.deploy-the-oceanbase-database.md b/zh-CN/2.deployment-guide/5.prepare-metadb-and-monitordb/2.deploy-the-oceanbase-database.md
index ab9d934f0815b16508798b2252f80f28d6ce1d9d..007d33deef4db09b1c6af39350223f8d81a0059e 100644
--- a/zh-CN/2.deployment-guide/5.prepare-metadb-and-monitordb/2.deploy-the-oceanbase-database.md
+++ b/zh-CN/2.deployment-guide/5.prepare-metadb-and-monitordb/2.deploy-the-oceanbase-database.md
@@ -81,7 +81,6 @@
           __min_full_resource_pool_memory: 268435456
           workers_per_cpu_quota: 10
           schema_history_expire_time: 1d
-          schema_history_expire_time: 1d
           net_thread_count: 4
           major_freeze_duty_time: Disable
           minor_freeze_times: 10