Diiference between HTTPS & HTTPS_443 monitors

e.g.

root@(B6900-R69-S5)(cfg-sync Standalone)(Active)(/Common)(tmos) create ltm pool foo members add { 1.1.1.1:any }

root@(B6900-R69-S5)(cfg-sync Standalone)(Active)(/Common)(tmos) modify ltm pool foo monitor https
01070622:3: The monitor /Common/https has a wildcard destination service and cannot be associated with a node that has a zero service.

root@(B6900-R69-S5)(cfg-sync Standalone)(Active)(/Common)(tmos) modify ltm pool foo monitor https_443

root@(B6900-R69-S5)(cfg-sync Standalone)(Active)(/Common)(tmos) list ltm pool foo
ltm pool foo {
    members {
        1.1.1.1:any {
            address 1.1.1.1
            session monitor-enabled
            state checking
        }
    }
    monitor https_443
}