From version < 4.1 >
edited by Vincent Massol
on 2012/11/08
To version < 5.1 >
edited by Denis Gervalle
on 2012/12/20
Change comment: Add a warning regarding old statistics migration



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1 -XWiki.VincentMassol
1 +XWiki.dgervalle
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2 2  {{toc/}}
3 3  {{/box}}
4 4  
5 +{{warning}}
6 +If you are migrating from an earlier version than 4.0, and your database contains statistics collected using a version earlier than 2.2, you will probably encounter an issue during our automated database migration. To avoid that issue, you will need to clean up your statistics by executing some SQL commands described in issue [[XWIKI-8129>>http://jira.xwiki.org/browse/XWIKI-8129]]. Be sure to apply these before attempting the migration. If your are in doubt, apply it, these could not hurt. If you don't, you will face duplicate IDs errors during the migration process, and it will fail, preventing you to run your wiki.
7 +{{/warning}}
8 +
5 5  This is probably the last bugfix release for the 4.1 series.
6 6  This release provides 30 bug fixes, mainly in the Extension Manager, including important fixes for extensions that provide components or script services (see [[XCOMMONS-231>>http://jira.xwiki.org/browse/XCOMMONS-231]] and [[XCOMMONS-232>>http://jira.xwiki.org/browse/XCOMMONS-232]]). It also improves the large data migration introduced in 4.0, in particular to support MS-SQL, and fixes an important issue that cause the migration of annotations to be unintentionally skipped (see below).
7 7  

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