I was seeing this error as well my channel has only a single one time purchase. I had to write Roku partner success to have them manually publish. since you have a subscription you may still need up/downgrade. this may help https://github.com/rokudev/samples/blob/master/roku%20pay/upgrade-downgrade-sample.zip
Hi @Raja,
What's your channel ID? And what's the exact error message you are seeing when trying to schedule your channel for publishing?
Obviously, on-device upgrade/downgrade is only possible if your channel has two or more channel products.
So please contact Partner Success with this issue and they'll work with you: https://developer.roku.com/contact