kolla-ansible deploy:err:”Initialise fernet key authentication: list object has no element 2″

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reference link:

https://review.opendev.org/#/c/548182/1/ansible/roles/keystone/tasks/init_fernet.yml

update the task yaml:

/root/dev_kolla/kolla-ansible/ansible/roles/keystone/tasks/init_fernet.yml
 to resolve this error:

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