diff --git a/src/gateway/session-utils.test.ts b/src/gateway/session-utils.test.ts
index dfacd937b0d7..49c64311f91a 100644
--- a/src/gateway/session-utils.test.ts
+++ b/src/gateway/session-utils.test.ts
@@ -846,6 +846,22 @@ describe("gateway session utils", () => {
     ).toBeNull();
   });
 
+  test("resolveDeletedAgentIdFromSessionKey rejects deleted configured ACP binding owners", () => {
+    const cfg = {
+      agents: { list: [{ id: "main", default: true }] },
+    } as OpenClawConfig;
+
+    expect(
+      resolveDeletedAgentIdFromSessionKey(
+        cfg,
+        "agent:deleted-agent:acp:binding:discord:default:feedface",
+      ),
+    ).toBe("deleted-agent");
+    expect(
+      resolveDeletedAgentIdFromSessionKey(cfg, "agent:main:acp:binding:discord:default:feedface"),
+    ).toBeNull();
+  });
+
   test("resolveSessionStoreKey canonicalizes bare keys to default agent", () => {
     const cfg = {
       session: { mainKey: "main" },
diff --git a/src/gateway/session-utils.ts b/src/gateway/session-utils.ts
index 0ffbcfcabd4d..40069107f489 100644
--- a/src/gateway/session-utils.ts
+++ b/src/gateway/session-utils.ts
@@ -922,14 +922,15 @@ export function resolveDeletedAgentIdFromSessionKey(
   cfg: OpenClawConfig,
   sessionKey: string,
 ): string | null {
-  // ACP keys use agent:<harnessId>:acp:<uuid>; harness ids are not agents.list entries.
-  if (isAcpSessionKey(sessionKey)) {
-    return null;
-  }
   const parsed = parseAgentSessionKey(sessionKey);
   if (!parsed) {
     return null;
   }
+  // Free ACP spawn keys use agent:<harnessId>:acp:<uuid>, but configured ACP
+  // bindings use agent:<agentId>:acp:binding:* where agentId remains the owner.
+  if (isAcpSessionKey(sessionKey) && !parsed.rest.startsWith("acp:binding:")) {
+    return null;
+  }
   const agentId = normalizeAgentId(parsed.agentId);
   if (listAgentIds(cfg).includes(agentId)) {
     return null;
diff --git a/src/gateway/sessions-resolve-store.test.ts b/src/gateway/sessions-resolve-store.test.ts
index ca09a611587c..03f64c7fab82 100644
--- a/src/gateway/sessions-resolve-store.test.ts
+++ b/src/gateway/sessions-resolve-store.test.ts
@@ -248,6 +248,51 @@ describe("resolveSessionKeyFromResolveParams store canonicalization", () => {
     });
   });
 
+  it("rejects configured ACP binding sessions when their owning agent is deleted", async () => {
+    await withStateDirEnv("openclaw-sessions-resolve-acp-binding-deleted-", async () => {
+      const cfg: OpenClawConfig = {
+        agents: { list: [{ id: "main", default: true }] },
+      };
+      const acpBindingKey = "agent:deleted-agent:acp:binding:discord:default:feedface";
+      const deletedStorePath = resolveStorePath(cfg.session?.store, { agentId: "deleted-agent" });
+      await saveSessionStore(deletedStorePath, {
+        [acpBindingKey]: {
+          sessionId: "sess-acp-binding-deleted",
+          label: "deleted-binding",
+          updatedAt: freshUpdatedAt(),
+        },
+      });
+      const expected = {
+        ok: false,
+        error: {
+          code: ErrorCodes.INVALID_REQUEST,
+          message: 'Agent "deleted-agent" no longer exists in configuration',
+        },
+      };
+
+      await expect(
+        resolveSessionKeyFromResolveParams({
+          cfg,
+          p: { key: acpBindingKey },
+        }),
+      ).resolves.toEqual(expected);
+
+      await expect(
+        resolveSessionKeyFromResolveParams({
+          cfg,
+          p: { sessionId: "sess-acp-binding-deleted" },
+        }),
+      ).resolves.toEqual(expected);
+
+      await expect(
+        resolveSessionKeyFromResolveParams({
+          cfg,
+          p: { label: "deleted-binding" },
+        }),
+      ).resolves.toEqual(expected);
+    });
+  });
+
   it("rejects an explicit listed deleted main key instead of remapping to the live default main", async () => {
     await withStateDirEnv("openclaw-sessions-resolve-key-deleted-main-", async () => {
       const cfg: OpenClawConfig = {