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No, unfortunately you can not. The feature request is tracked at https://labs-support.atlassian.net/browse/AKIT-4, but it will not be available in the foreseeable future. It is recommended for sure to download backups if possible. To do so, use the bash scripts listed below:
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Backup script for Jira Cloud
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consider going with https://bitbucket.org/atlassianlabs/automatic-cloud-backup/src/master/.
How can I proceed the backup restoration?
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