You can edit certain aspects of an existing multi-machine blueprint.
Restrictions exist for configuring component machines if the blueprint provisioned existing multi-machine services:
You cannot add new component types to the multi-machine service.
You cannot delete component blueprints from the multi-machine service.
You cannot change the business groups associated with the multi-machine blueprint or the component blueprint.
These restrictions prevent an existing multi-machine service from reaching an unhealthy state because of changes in the blueprint. To make any of these changes to the component machine configuration in a multi-machine blueprint, either decommission all existing services that use the blueprint, or create a copy of the blueprint and update the configuration in the copy.
If you change the maximum value for a component type, existing services that have more component machines of that type than the new maximum do not become invalid. Users cannot add more machines of that component type until the number of machines falls below the maximum.
When you change custom properties on a multi-machine blueprint, the new properties are applied to new multi-machine services that are provisioned from this blueprint. They are also inherited by component machines that are added to existing multi-machine services that are provisioned from this blueprint.