com.xpn.xwiki.XWikiException: Error number 3202 in 3: Exception while reading document [name = [XWikiPreferences], type = [DOCUMENT], parent = [name = [XWiki], type = [SPACE], parent = [name = [xwiki], type = [WIKI], parent = [null]]]]
Wrapped Exception: Error number 3301 in 3: Exception while switching to database xwiki
Wrapped Exception: Main database migration failed, it is not safe to continue!
com.xpn.xwiki.plugin.scheduler.SchedulerPluginException: Error number 90000 in 5: Exception in plugin [com.xpn.xwiki.plugin.scheduler.SchedulerPlugin]: Error while saving XWiki.SchedulerJobClass class document in XWiki
Wrapped Exception: Error number 3201 in 3: Exception while saving document workspacetemplate:XWiki.SchedulerJobClass
Wrapped Exception: Error number 3301 in 3: Exception while switching to database workspacetemplate
Wrapped Exception: Migration of database [workspacetemplate] has failed, it could not be safely used! Database is currently in version  while the required version is .