I'm not fully sure, but this may be caused by the fact that the 'users' property of your object (XWikiRights I guess) was previously saved with a different data type. Probably something like xwikidoc <-- xwikiobjects <-- xwikiproperties <-- xwikistringlists vs. xwikidoc <-- xwikiobjects <-- xwikiproperties <-- xwikilargestrings

So when XWiki tries to save the 'users' property it sees that it has a different type (so different database table) than the previously saved value and thus it throws an exception. Try to pass a list/array as the value of the property instead of a string. Hope this helps, Marius On Thu, Aug 21, 2014 at 3:21 PM, Paul Libbrecht &lt;paul(a)hoplahup.net&gt; wrote: > any hints? > paul > > > On 20 août 2014, at 11:37, Paul Libbrecht &lt;paul(a)hoplahup.net&gt; wrote: > >> >> Hello XWiki exports, >> >> I've been working on a tool to massively import users from a spreadsheets for curriki.org (still on xwiki 3.5.1) and I am stumbling into an error that I could not solve thus far: >> >>> org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [com.xpn.xwiki.objects.LargeStringProperty#<?xml version="1.0" encoding="UTF-8"?> >>> <users>poiapsaodi</users>] >> >> >> (user-name is invented) >> >> The users element is that of the xwikiRights object. >> This exception happens at a saveandcontinue action which is triggered in the object editor after I (as admin) edit the user. It also happens if the user is logged in. >> >> >> How can I investigate this? >> I've tried changing the way I write the object in the following (adding the "new String") as it was done in the social-login but still no hope: >> def rightobj = userDoc.newObject("XWiki.XWikiRights", xcontext); >> rightobj.setStringValue("users", new String(userName)); >> rightobj.setStringValue("allow", new String("1")); >> rightobj.setStringValue("levels", new String("edit")); >> rightobj.setStringValue("groups", new String("")); >> >> Note: at curriki, we use the "virtual xwikiUsers group" since we have quite an amount of them. >> >> Any investigation hint is welcome. >> >> paul > > _______________________________________________ > devs mailing list > devs(a)xwiki.org > http://lists.xwiki.org/mailman/listinfo/devs