I tried to retore backup and the process failed with the following error:
Deployer has been terminated by exception:
Line 4 error: Element 'user', attribute 'external-email': The attribute 'external-email' is not allowed.
Line 5 error: Element 'assigned-application': This element is not expected.
Line 181 error: Element 'pmm-extension-package': This element is not expected.
I am using Plesk Panel 11.0.9 version and checked backup version:
# grep dump-version /var/lib/psa/dumps/<<..backup_name..>.xml
<migration-dump content-included="true" agent-name="PleskX" dump-format="panel" dump-version="11.5.30">
Backup was created on the Plesk version 11.5. Backup of higher version cannot be restored into a Plesk server of lower version.