in kolla ansible (release: victoria) when i run command: " kolla-ansible -i ./multinode bootstrap-servers --limit compute1 "

i receive this error:
TASK [baremetal : Enable docker apt repository] * fatal: [R5DG1.cpaas.ir]: FAILED! => {"changed": false, "msg": "apt cache update failed"}
could you please help me how could i fix this?
( my compute1 has the ubuntu20 )