AWS Instance Scheduler Remote v1.5.1 Deployment Rollbacks

We were on cloudformation template v1.4.2 I just update the hub account(where I used organization ID to be managed by it) with v1.5.1, then as usual went on updating the spoke accounts so that these can be managed by hub account. But it keeps asking for SSMParameterNamespace which I didn't see any option to input in any of the templates.

Please help.