There seems to be no straightforward way to move a session from one collection to another. As a workaround, this can currently be done by downloading the session WARC and then importing it to another collection.
This is something we are looking to support in the near future, will update this post when it's available. Otherwise the workaround you mentioned is the best way to do this at the moment.
There seems to be no straightforward way to move a session from one collection to another. As a workaround, this can currently be done by downloading the session WARC and then importing it to another collection.