The Administrative-State is the status you want it to have. Operation-State is the status you observe.
So maybe you want to enable a port. You set Admin Status to "up" but there is no cable connected to the port. So it can never reach Oper Status "up" and will stay in Oper Status "down".
If you set the Admin Status to 10000 but the remote switch has only a 1GB Port, the Oper Status will stay at 1000.
I don't know if the LIF will be migrated. It would be saver to migrate it off the port manually before changing the configuration.