Migration for XWIKI1933: Editing users fails.
Note: This data migration should only be executed if the R4340XWIKI833 one has already been executed
during a previous migration (i.e. if the database is in version >= 4340). This is because it
fixes a bug that cause the previous data migration to have only been executed in the main wiki, and
there was some code that inserted wrong data after the migration.
startupVersion - the database version when the migration process starts (before any dataMigration is
applied). This is useful for data migration which need to run only when the database is in a certain
true if the migration should be executed or false otherwise