diff --git a/metrics/grafana/ticdc.json b/metrics/grafana/ticdc.json
index e2b37d14ab..6f771755a5 100644
--- a/metrics/grafana/ticdc.json
+++ b/metrics/grafana/ticdc.json
@@ -19503,7 +19503,7 @@
           "linewidth": 1,
           "links": [],
           "maxPerRow": 3,
-          "nullPointMode": "null",
+          "nullPointMode": "null as zero",
           "percentage": false,
           "pluginVersion": "6.1.6",
           "pointradius": 5,