It seems like there are no history logs of who removed or restored a page version within Confluence. Is there a way to find this solution?
Not unless you're using shared groups. If you have one user directory they both use, and you configure both applications to use the same group for "can use", then you'll need to match licence numbers.
If you do NOT use the same group, then no, you don't need to match licences (e.g. have 500 JIRA users in the group "JIRA users", but only 50 in "confluence users")
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