Getting bad request when I include content-length in Headers for karate request

Question

I am performing one karate POST request where "Content-Length" in headers is mandatory field, the request has Content-Length = . when I pass it , the response looks something like Content-Length header already present, http call failed. when I remove it response says bad request, I have validated in POST-MAN and without Content-Length = its returning 400 error. Is there any work around on it.