[xwiki-users] org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction

Hi, I've tried to install (with extension manager) FullCalendar Application in XWiki 4.1.3. The installation crashed (because of a column value too small in xwikilargestrings table), so I tried to install again with the .xar. It's impossible to import Calendar.JQuery. I've the error message : Wrapped Exception: 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"?> <code></code> ] at org.hibernate.persister.entity.AbstractEntityPersister.check(AbstractEnt ityPersister.java:1950) at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEn tityPersister.java:2594) at org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(Ab stractEntityPersister.java:2494) at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEn tityPersister.java:2821) ... Any idea to resolve this problem ? Thank you Best regards Nicolas