You can shut down a management VPLS without deleting the service parameters.
When a management VPLS is disabled, all associated user VPLS services are also disabled (to prevent loops). If this is not desired, first unmanage the user VPLS service by removing them from the managed-vlan-list.
— config>service
— vpls service-id
— shutdown
— config>service# vpls 1
— config>service>vpls# shutdown
— config>service>vpls# exit