What were you trying to do that didn't work?
Wrong prompt on dst host when enable any migration capability after setting postcopy-preempt and migrate incoming
eg:
(qemu) migrate_set_capability postcopy-ram on
(qemu) migrate_set_capability postcopy-preempt on
(qemu)migrate_incoming tcp:[::]:1234
(qemu) migrate_set_capability late-block-activate on
Error: Postcopy preempt must be set before incoming starts
(qemu) migrate_set_capability events on
Error: Postcopy preempt must be set before incoming starts

Please provide the package NVR for which bug is seen:
qemu-kvm-9.1

How reproducible:
100%

Steps to reproduce
1.
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Expected results
I think we don't permit to enable any migration capability after set migration incoming.
Please give a right prompt if we don't support

Actual results