To update an asset subscription in the repository, get the existing subscription, make changes, and use the addSubscription method. Use RAMSession.put(RAMAsset, RAMStatusMonitor) to update the asset subscription.
//Update an existing subscription
existingSub.setName("Change the subscription title");
existingSub.setFrequency(Frequency.WEEKLY);
asset.addSubscription(existingSub);
session.put(asset, new RAMStatusMonitor());