The correct answer is A newly created backup will replace the existing backup file on the Backup Manager page.

A newly created backup will replace the existing backup file on the Backup Manager page is correct because Jira Cloud presents the most recent site export on the Backup Manager page and initiating a new export overwrites the previously stored backup. You should download or move the export to your own storage if you need to keep multiple historical copies or older snapshots.

Only site administrators can generate backup exports and import Jira Cloud data is incorrect because permissions for exports and imports depend on product and admin roles and are not strictly limited to a single site admin role in every scenario. Jira and cloud admin permissions determine who can perform these actions so the statement is too absolute.

Imported user accounts cannot be merged with existing cloud users during a data import is incorrect because the import process supports mapping imported users to existing cloud accounts so user associations like reporters and assignees can be preserved by mapping to current users.

Team managed projects are excluded from backups and cannot be restored from a backup file is incorrect because team managed projects are included in Jira Cloud site backups and can be restored from an XML site export subject to the usual import limitations for attachments and app data.

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