^ "{"error":{"root_cause":[{"type":"x_content_parse_exception","reason":"[1:364] [bucket_sort] failed to parse field [from]"}],"type":"x_content_parse_exception","reason":"[1:364] [bucket_sort] failed to parse field [from]","caused_by":{"type":"illegal_argument_exception","reason":"[from] must be a non-negative integer: [-15]"}},"status":400}"