Can't delete a virtual site with SQL Server

2010-03-23 15:03:24,641: ERROR [org.hibernate.util.JDBCExceptionReporter] - Conversion failed when converting the varchar value 'ContentField_' to data type int.
2010-03-23 15:03:24,641: ERROR [org.jahia.bin.JahiaAdministration] - Error during sites operation of a new element we must flush all caches to ensure integrity betw
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org.hibernate.exception.SQLGrammarException: could not execute update query
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:59)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.hql.ast.UpdateStatementExecutor.execute(UpdateStatementExecutor.java:99)
at org.hibernate.hql.ast.QueryTranslatorImpl.executeUpdate(QueryTranslatorImpl.java:297)
at org.hibernate.impl.SessionImpl.executeUpdate(SessionImpl.java:871)
at org.hibernate.impl.QueryImpl.executeUpdate(QueryImpl.java:89)
at org.jahia.hibernate.dao.JahiaLinkDAO.deleteAllLinksForSite(JahiaLinkDAO.java:70)
at org.jahia.hibernate.dao.JahiaSiteDAO.remove(JahiaSiteDAO.java:297)
at org.jahia.hibernate.manager.JahiaSiteManager.remove(JahiaSiteManager.java:73)
at org.jahia.hibernate.manager.JahiaSiteManager$$FastClassByCGLIB$$1ec2bf09.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)
at org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:661)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:122)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:57)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:144)
at org.springframework.aop.interceptor.AbstractTraceInterceptor.invoke(AbstractTraceInterceptor.java:80)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:144)
at org.springframework.aop.framework.Cglib2AopProxy$FixedChainStaticTargetInterceptor.intercept(Cglib2AopProxy.java:546)
at org.jahia.hibernate.manager.JahiaSiteManager$$EnhancerByCGLIB$$c9a77abc.remove(<generated>)
at org.jahia.services.sites.JahiaSitesBaseService.removeSite(JahiaSitesBaseService.java:341)
at org.jahia.services.sites.JahiaSitesBaseService$$FastClassByCGLIB$$4d40271e.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)
at org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:661)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:122)
at org.springframework.aop.interceptor.AbstractTraceInterceptor.invoke(AbstractTraceInterceptor.java:80)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:144)
at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:606)
at org.jahia.services.sites.JahiaSitesBaseService$$EnhancerByCGLIB$$e79403cb.removeSite(<generated>)
at org.jahia.admin.sites.ManageSites.delete(ManageSites.java:2228)
at org.jahia.admin.sites.ManageSites.processMultipleDelete(ManageSites.java:2128)
at org.jahia.admin.sites.ManageSites.userRequestDispatcher(ManageSites.java:201)
at org.jahia.admin.sites.ManageSites.<init>(ManageSites.java:154)
at org.jahia.bin.JahiaAdministration.userRequestDispatcher(JahiaAdministration.java:401)
at org.jahia.bin.JahiaAdministration.service(JahiaAdministration.java:266)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.jahia.bin.filters.esi.ESIFilter.doFilter(ESIFilter.java:110)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Thread.java:619)
Caused by: com.microsoft.sqlserver.jdbc.SQLServerException: Conversion failed when converting the varchar value 'ContentField_' to data type int.
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDatabaseError(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerStatement.getNextResult(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.doExecutePreparedStatement(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement$PrepStmtExecCmd.doExecute(Unknown Source)
at com.microsoft.sqlserver.jdbc.TDSCommand.execute(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.executeCommand(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeCommand(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeStatement(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.executeUpdate(Unknown Source)
at org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:102)
at org.hibernate.hql.ast.UpdateStatementExecutor.execute(UpdateStatementExecutor.java:76)
... 50 more
2010-03-23 15:03:24,985: INFO [org.jahia.services.cache.CacheFactory] - Flushed all caches.