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https://issues.apache.org/jira/browse/JCR-3635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13725282#comment-13725282
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Jukka Zitting commented on JCR-3635:
------------------------------------

See JCR-517 for a related issue where something similar was discussed earlier. 
Perhaps we should revisit that discussion, and declare at least some properties 
like the mentioned jcr:frozenUuid to be reserved, even if it's not declared as 
protected in the parent node type.
                
> Manually specified jcr:frozenUuid overwriting the one assigned by the 
> VersionManager when versioning node
> ---------------------------------------------------------------------------------------------------------
>
>                 Key: JCR-3635
>                 URL: https://issues.apache.org/jira/browse/JCR-3635
>             Project: Jackrabbit Content Repository
>          Issue Type: Bug
>          Components: versioning
>    Affects Versions: 2.7
>            Reporter: Florin Iordache
>            Assignee: Jukka Zitting
>             Fix For: 2.7.1
>
>         Attachments: CopyFrozenUuidTest.java, JCR-3635.patch
>
>
> Let's assume we have node N with a manually assigned jcr:frozenUuid property 
> (e.g. taken from an existing frozenNode version of another node).
> When creating versions of node N, the manually assigned frozenUuid property 
> will overwrite the frozenUuid automatically created by the VersionManager in 
> the versioning process because the jcr:frozenUuid property is not skipped 
> when copying the existing properties from the versioned node to the frozen 
> node in the version subtree.
> This can potentially cause issues whenever the jcr:frozenUuid is used in the 
> future, since it would basically point to a different versioned node.

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