diff --git a/src/main/runtime/orchestration/db-task-dispatch-lifecycle-guards.test.ts b/src/main/runtime/orchestration/db-task-dispatch-lifecycle-guards.test.ts
index cf18fe52fc8..0111371f9fe 100644
--- a/src/main/runtime/orchestration/db-task-dispatch-lifecycle-guards.test.ts
+++ b/src/main/runtime/orchestration/db-task-dispatch-lifecycle-guards.test.ts
@@ -83,6 +83,29 @@ describe('Task/Dispatch lifecycle guards', () => {
     }
   )
 
+  it('settles a newer context-only legacy sibling after a worker report', () => {
+    const database = createDatabase()
+    const task = database.createTask({ spec: 'reversed legacy mixed split' })
+    const worker = startWorker(database, task.id, 'reversed_reporter')
+    sqliteFor(database).prepare("UPDATE tasks SET status = 'ready' WHERE id = ?").run(task.id)
+    const contextOnly = database.createDispatchContext(task.id, 'term_reversed_context')
+
+    expect(
+      database.settleWorkerReport({
+        taskId: task.id,
+        dispatchId: worker.dispatchId,
+        outcome: 'succeeded',
+        result: 'reversed sibling completed'
+      })
+    ).toEqual({ action: 'settled', outcome: 'succeeded', duplicate: false })
+    expect(database.getTask(task.id)?.status).toBe('completed')
+    expect(database.getDispatchContextById(contextOnly.id)).toMatchObject({
+      status: 'completed',
+      capability_revoked_at: expect.any(String)
+    })
+    expect(database.getActiveDispatchForTerminal('term_reversed_context')).toBeUndefined()
+  })
+
   it('rejects generic failure while a supervised worker remains active', () => {
     const database = createDatabase()
     const task = database.createTask({ spec: 'supervised failure guard' })
diff --git a/src/main/runtime/orchestration/db.ts b/src/main/runtime/orchestration/db.ts
index 6c1a12bc474..545397faf46 100644
--- a/src/main/runtime/orchestration/db.ts
+++ b/src/main/runtime/orchestration/db.ts
@@ -7608,15 +7608,6 @@ export class OrchestrationDb {
         reason: `inactive dispatch ${params.dispatchId}: it or task ${params.taskId} is already settled.`
       }
     }
-    const latest = this.getActiveDispatchForTask(params.taskId)
-    if (latest?.id !== params.dispatchId) {
-      return {
-        action: 'rejected',
-        code: 'stale_dispatch',
-        reason: `Dispatch ${params.dispatchId} is not the current dispatch for task ${params.taskId}.`
-      }
-    }
-
     const conflictingWorker = this.db
       .prepare(
         `SELECT active.id
@@ -7635,6 +7626,15 @@ export class OrchestrationDb {
         reason: `Task ${params.taskId} still has active supervised Dispatch ${conflictingWorker.id}; stop or settle it before completing ${params.dispatchId}.`
       }
     }
+    const reportingWorker = this.getWorkerDispatch(params.dispatchId)
+    const latest = this.getActiveDispatchForTask(params.taskId)
+    if (!reportingWorker && latest?.id !== params.dispatchId) {
+      return {
+        action: 'rejected',
+        code: 'stale_dispatch',
+        reason: `Dispatch ${params.dispatchId} is not the current dispatch for task ${params.taskId}.`
+      }
+    }
     const siblingDispatchIds = this.db
       .prepare(
         `SELECT id FROM dispatch_contexts