“Declaring a field required with Form(...) is supposed to mean the client must send it. On 0.161.1, that constraint simply didn't exist for booleans — the field was always "present," just always False.” 译：用 Form(...) 声明必选，本意是客户端必须传。但在 0.161.1 上，这个约束对布尔字段根本不存在——字段永远「存在」，只是永远是 False。