diff --git a/openclaw.json b/openclaw.json
index f7aedf9..87efd8d 100644
--- a/openclaw.json
+++ b/openclaw.json
@@ -136,6 +136,9 @@
   "agents": {
     "ownership": "explicit",
     "defaults": {
+      "systemAgent": {
+        "agentId": "main"
+      },
       "model": {
         "primary": "deepseek/deepseek-v4-flash"
       },