diff --git a/src/cron/store-migration.test.ts b/src/cron/store-migration.test.ts
index 79f3314c0..1cf433188 100644
--- a/src/cron/store-migration.test.ts
+++ b/src/cron/store-migration.test.ts
@@ -75,4 +75,25 @@ describe("normalizeStoredCronJobs", () => {
       channel: "slack",
     });
   });
+
+  it("does not report legacyPayloadKind for already-normalized payload kinds", () => {
+    const jobs = [
+      {
+        id: "normalized-agent-turn",
+        name: "normalized",
+        enabled: true,
+        wakeMode: "now",
+        schedule: { kind: "every", everyMs: 60_000, anchorMs: 1 },
+        payload: { kind: "agentTurn", message: "ping" },
+        sessionTarget: "isolated",
+        delivery: { mode: "announce" },
+        state: {},
+      },
+    ] as Array<Record<string, unknown>>;
+
+    const result = normalizeStoredCronJobs(jobs);
+
+    expect(result.mutated).toBe(false);
+    expect(result.issues.legacyPayloadKind).toBeUndefined();
+  });
 });
diff --git a/src/cron/store-migration.ts b/src/cron/store-migration.ts
index 11789422e..260b89cfe 100644
--- a/src/cron/store-migration.ts
+++ b/src/cron/store-migration.ts
@@ -28,14 +28,21 @@ function incrementIssue(issues: CronStoreIssues, key: CronStoreIssueKey) {
 }
 
 function normalizePayloadKind(payload: Record<string, unknown>) {
-  const raw = typeof payload.kind === "string" ? payload.kind.trim().toLowerCase() : "";
-  if (raw === "agentturn") {
-    payload.kind = "agentTurn";
-    return true;
+  const original = typeof payload.kind === "string" ? payload.kind.trim() : "";
+  const lowered = original.toLowerCase();
+  if (lowered === "agentturn") {
+    if (original !== "agentTurn") {
+      payload.kind = "agentTurn";
+      return true;
+    }
+    return false;
   }
-  if (raw === "systemevent") {
-    payload.kind = "systemEvent";
-    return true;
+  if (lowered === "systemevent") {
+    if (original !== "systemEvent") {
+      payload.kind = "systemEvent";
+      return true;
+    }
+    return false;
   }
   return false;
 }