diff --git a/apps/server/src/modules/acquisition-organize/services/acquisition.ts b/apps/server/src/modules/acquisition-organize/services/acquisition.ts
index f6cd5bf5..a9a6f36f 100644
--- a/apps/server/src/modules/acquisition-organize/services/acquisition.ts
+++ b/apps/server/src/modules/acquisition-organize/services/acquisition.ts
@@ -1103,12 +1103,18 @@ export function subscriptionSavePath(t: Pick<InstanceTopology, "inst" | "mapping
 
 /**
  * 旧计划是否让位给新计划(T1-3c):失败 / 取消 / 过期可以重建(站点 Cookie 修好、下载器恢复、集数映射改号后重评),
- * 但用户明确不要的(在下载器里移除、手动取消)和整理阶段失败的(文件已下好,重下同一种子无意义,交给整理重试)仍挡住。
+ * 但用户明确不要的(在下载器里移除、手动取消)和整理阶段失败的(文件已下好,重下同一种子无意义,交给整理重试)仍挡住;
+ * 同一种子已被别的计划占用而取消的(torrent_in_use_by_plan)也挡住,否则取消即重评、重评又撞上同一任务,来回空转。
  */
 function planRetryable(p: { status: string; status_reason: string | null }): boolean {
   if (!["failed", "cancelled", "expired"].includes(p.status)) return false;
   const r = p.status_reason ?? "";
-  return r !== "download_removed" && r !== "cancelled_by_user" && !r.startsWith("organize:");
+  return (
+    r !== "download_removed" &&
+    r !== "cancelled_by_user" &&
+    !r.startsWith("organize:") &&
+    !r.startsWith("torrent_in_use_by_plan")
+  );
 }
 
 async function reserve(
diff --git a/apps/server/test/acquisition-organize/blocked-reevaluate.test.ts b/apps/server/test/acquisition-organize/blocked-reevaluate.test.ts
index ea956b38..7e8a41d0 100644
--- a/apps/server/test/acquisition-organize/blocked-reevaluate.test.ts
+++ b/apps/server/test/acquisition-organize/blocked-reevaluate.test.ts
@@ -302,6 +302,20 @@ describe.skipIf(!hasPg)("被挡住与失败后的重评", () => {
     expect((await evaluateAcquisition(h.d, { sourceReleaseId: rel })).plans).toHaveLength(0);
   });
 
+  it("同一种子已被别的计划占用而取消的不让位(避免取消 → 重评 → 再撞上同一任务的空转)", async () => {
+    const { entityId, slotId } = await movieSlot("InUse Movie");
+    const rel = await release(entityId, "InUse.Movie.2024.1080p.WEB-DL.x264-GRP");
+    const ev1 = await evaluateAcquisition(h.d, { sourceReleaseId: rel });
+    expect(ev1.plans).toHaveLength(1);
+    await db()
+      .updateTable("acquisition_plan")
+      .set({ status: "cancelled", status_reason: "torrent_in_use_by_plan:00000000-0000-0000-0000-000000000000" })
+      .where("id", "=", ev1.plans[0]!)
+      .execute();
+    await releaseSlot(slotId);
+    expect((await evaluateAcquisition(h.d, { sourceReleaseId: rel })).plans).toHaveLength(0);
+  });
+
   it("在途计划(已提交)仍挡住同一资源", async () => {
     const { entityId } = await seriesSlot("Inflight Series");
     const rel = await release(entityId, "Inflight.Series.S01E01.1080p.WEB-DL.x264-GRP");