V0 on the existing 157 real rows matches the 09-19 cache. The staging extract has no case linkage, so V1/V2 are unmeasured and the verdict stays 缺数据.
来源 C 900 条 + jev-1.13.0 双跑。高置信错误 7%、点选题 answer_class 65%。不改线上分类器。