You can do a full system import only. If you intend to use a project import (as suggested by "merge" in your question), then you will need to upgrade your 5.1 data to 6.4 before exporting it, such as by setting up a new 6.4 instance and importing it there, then exporting it from there to use for the project import.
Hi Community! I’m Elaine, Confluence Product Manager. You may have read my earlier post about page tree in space navigation sidebar. I'm excited to share another improvement that helps you organize ...
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