After migrating Plesk Client to new node I cannot resolve conflict - no Hosting Plans available under "Select hosting plan". But the Hosting Plan assigned to old Plesk Client subscription should be available.
Old subscription was not synchronized with the Hosting Plan.
Before migrating Plesk Client to new node, synchronize the subscription with the latest version of the Hosting Plan:
Top > Billing Director > Product Manager > Hosting Plans > HOSTING_PLAN_NAME > Subscriptions > Synchronize Subscriptions
This will synchronize preferences of migrated Plesk Client with the Hosting Plan.