diff --git a/.claude/skills/parse-book/scripts/parse_upgrade.py b/.claude/skills/parse-book/scripts/parse_upgrade.py
index 0d50a1b..c2756f4 100644
--- a/.claude/skills/parse-book/scripts/parse_upgrade.py
+++ b/.claude/skills/parse-book/scripts/parse_upgrade.py
@@ -490,6 +490,9 @@ def undo_window(conn, work_id, win_no):
             (TENANT, work_id, SOURCE_TYPE)).fetchall():
         if payload.get("来源") == f"升格@窗{win_no}":
             conn.execute("UPDATE muse_knowledge_draft SET deleted=TRUE WHERE id=%s", (did,))
+            # 同步清卡水位行（fable 复验实证：深空回滚删 400+ 初卡后 card_state 僵尸行
+            # 残留，按 draft JOIN 不过滤 deleted 的查询会捞出僵尸卡）
+            conn.execute("DELETE FROM example_upgrade_card_state WHERE draft_id=%s", (did,))
             continue
         tag, changed = f"[窗{win_no}] ", False
         for k, v in list(payload.get("字段", {}).items()):