Hi!
We need to complete this task:
-- move some space from one server to another. both servers have the same version of confluence. we trying to do it with standard "Backup&Restore" functionality. all looks perfect as a first approximation 
We've got xml-backup of confluence space from source server (Parameters of confluence instance: version of confluence - 5.4.3, build - 4252).
We've got new server with the same version of confluence 5.4.3, but build number between servers doesn't match (our 4517).
We changed build number in xml-backup from 4252 to 4517. Otherwise an error is displayed
Both servers have the same set of groups.
In process of import new error is displayed:
com.atlassian.confluence.importexport.ImportExportException: Unable to complete import: Error while importing backup: Found two representations of same collection: com.atlassian.confluence.spaces.Space.permissions; nested exception is net.sf.hibernate.HibernateException: Found two representations of same collection: com.atlassian.confluence.spaces.Space.permissions
Any advice will be much appreciated.
Cheers.