哪个大神知道这个错误是什么导致的？是在更新文档的时候报的错误

{"error":{"root_cause":[{"type":"action_request_validation_exception","reason":"Validation Failed: 1: script or doc is missing;"}],"type":"action_request_validation_exception","reason":"Validation Failed: 1: script or doc is missing;"},"status":400}