[Apiman-user] How to update backend implementation URL for published Service without changing the version

Hi All, I am using APIMAN 1.1.9 and for an existing API that I have published to consumers, I like to change its backend implementation end point URL without changing the API service version. I updated the backend implementation URL in database table "service_versions". I can see the updated URL from UI but still the gateway is using the old implementation URL specified. Does it cache the implementation URL once the service is published ? Is there anyway I can update the implementation URL for an existing service? Appreciate your time and help. Thanks Sanjay