diff --git a/grafana-tidb-dashboard.md b/grafana-tidb-dashboard.md
index 52e04b900ce64..e7b1e086514c5 100644
--- a/grafana-tidb-dashboard.md
+++ b/grafana-tidb-dashboard.md
@@ -165,6 +165,5 @@ To understand the key metrics displayed on the TiDB dashboard, check the followi
 
 - Batch Client
     - Pending Request Count by TiKV: the number of Batch messages that are pending processing
-    - Wait Duration 95: the waiting time of Batch messages that are pending processing
     - Batch Client Unavailable Duration 95: the unavailable time of the Batch client
     - No Available Connection Counter: the number of times the Batch client cannot find an available link