Upgrade Started-Once container without Starting it

We have a short-lived container which runs a process and then exits. We use container-crontab to schedule this container to run on a daily basis. We periodically need to update the short-lived container to a use a new image. When I use the UI to do an upgrade, in addition to changing image version it also ends running the container. What I’d like is to update the container image but not have it invoked until the next scheduled run by container-crontab.