Upgrade v3.0.8 to v4.0 Exception

Unify.Framework.UnifyServiceInitializeException: 'FK_EntityValue_CollectionKey'
is not a constraint.
Could not drop constraint. See previous errors. ---> System.Data.SqlClient.SqlEx
ception: 'FK_EntityValue_CollectionKey' is not a constraint.
Could not drop constraint. See previous errors.
   at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolea
n breakConnection)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning()
   at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cm
dHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, Tds
ParserStateObject stateObj)
   at System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName,
Boolean async)
   at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult res
ult, String methodName, Boolean sendToPipe)
   at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
   at System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo
 queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs
, ICompiledSubQuery[] subQueries, Object lastResult)
   at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryI
nfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompile
dSubQuery[] subQueries)
   at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider
.Execute(Expression query)
   at System.Data.Linq.DataContext.ExecuteCommand(String command, Object[] param
eters)
   at Unify.Framework.Data.LinqContextConversionBase`4.SubmitChanges()
   at Unify.Product.IdentityBroker.IdentityBrokerEngine.ClearOldPartitions()
   at Unify.Product.IdentityBroker.IdentityBrokerEngine.Initialize()
   at Unify.Framework.UnifyEngine`1.Initialize()
   --- End of inner exception stack trace ---
   at Unify.Framework.UnifyEngine`1.Initialize()
   at Unify.Service.Connect.Debug.ProgramProxy.Execute()