create a JIRA ticket successfully without changing the "Reporter field" to not required .

I'm using ReadyAPi 2.1 and trying to create a JIRA ticket but it fails with this message ,

RestClientException{statusCode=Optional.of(400), errorCollections=[ErrorCollection{status=400, errors={reporter=data was not an object, customfield_11100=Invalid format. Expected an array of objects with either an Option ID or an existing value.}

On the net one of the suggestions which worked was that we change the "reporter" to not required but we have a mandate to have it as Required , So is there another way to create the JIRA without editing the schema in JIRA from the ReadAPI side?