Sometimes catch StorageException with this error

Simple query "ALTER TABLE [dbo].[Filter] REBUILD" repair this But maybe DO should execute this query? :)

Full error:

    Xtensive.Orm.StorageException: SQL error occured.
    SQL error details 'Type: Unknown;'
    Query 'UPDATE [dbo].[Filter] SET [Name] = (CASE WHEN ([Filter].[TempName] IS NULL) THEN N'' WHEN ([Filter].[TempName] IS NOT NULL) THEN CAST([Filter].[TempName] AS nvarchar(400)) END);
    EXEC sp_rename '[shchipacheva].[dbo].[Filter].[User_Id]', 'TempUser_Id', 'COLUMN';
    ALTER TABLE [dbo].[Filter] ADD [User_Id] uniqueidentifier DEFAULT '00000000-0000-0000-0000-000000000000' NOT NULL;'
    Original message 'Cannot create a row of size 8061 which is greater than the allowable maximum row size of 8060.
    The statement has been terminated.
    Caution: Changing any part of an object name could break scripts and stored procedures.
    Warning: The table "Filter" has been created, but its maximum row size exceeds the allowed maximum of 8060 bytes. INSERT or UPDATE to this table will fail if the resulting row exceeds the size limit.' ---> System.Data.SqlClient.SqlException: Cannot create a row of size 8061 which is greater than the allowable maximum row size of 8060.
    The statement has been terminated.
    Caution: Changing any part of an object name could break scripts and stored procedures.
    Warning: The table "Filter" has been created, but its maximum row size exceeds the allowed maximum of 8060 bytes. INSERT or UPDATE to this table will fail if the resulting row exceeds the size limit.
    at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
    at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
    at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
    at System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async, Int32 timeout, Boolean asyncWrite)
    at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(TaskCompletionSource`1 completion, String methodName, Boolean sendToPipe, Int32 timeout, Boolean asyncWrite)
    at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
    at Xtensive.Orm.Providers.StorageDriver.ExecuteCommand[TResult](Session session, DbCommand command, Func`2 action)
    --- End of inner exception stack trace ---
    at Xtensive.Orm.Providers.StorageDriver.ExecuteCommand[TResult](Session session, DbCommand command, Func`2 action)
    at Xtensive.Orm.Providers.SqlExecutor.ExecuteManyBatched(IEnumerable`1 statements)
    at Xtensive.Orm.Upgrade.UpgradeActionSequence.ProcessWith(Action`1 regularProcessor, Action`1 nonTransactionalProcessor)
    at Xtensive.Orm.Upgrade.SchemaUpgrader.UpgradeSchema(SchemaExtractionResult extractedSchema, StorageModel sourceModel, StorageModel targetModel, ActionSequence upgradeActions)
    at Xtensive.Orm.Upgrade.UpgradingDomainBuilder.SynchronizeSchema(Domain domain, SchemaUpgrader upgrader, SchemaExtractor extractor, SchemaUpgradeMode schemaUpgradeMode)
    at Xtensive.Orm.Upgrade.UpgradingDomainBuilder.PerformUpgrade(Domain domain, UpgradeStage stage)
    at Xtensive.Orm.Upgrade.UpgradingDomainBuilder.BuildMultistageDomain()
    at Xtensive.Orm.Upgrade.UpgradingDomainBuilder.Run()
    at Xtensive.Orm.Upgrade.UpgradingDomainBuilder.Build(DomainConfiguration configuration)

Up 7.10.2015 On perform without changes in model, DO execute strange queries DROP/CREATE INDEX, ALTER TABLE etc.

Sample

using System;
using Xtensive.Orm;
using Xtensive.Orm.Configuration;

class Program
{
    static void Main(string[] args)
    {
        var dc = new DomainConfiguration("sqlserver://localhost/DO40-Tests");

        /// First time dc.UpgradeMode = DomainUpgradeMode.Recreate;
        /// then 
        dc.UpgradeMode = DomainUpgradeMode.Perform;

        dc.Types.Register(typeof(Program).Assembly);

        using (var d = Domain.Build(dc))
        {
            using (var s = d.OpenSession())
            using (s.Activate())
            using (var t = s.OpenTransaction())
            {
                t.Complete();
            }

            Console.WriteLine(".");
        }
    }
}

/// <summary>
/// Saved grid filters
/// User defined grid filters
/// </summary>
/// <revision>$Rev$</revision>
[HierarchyRoot]
[Serializable]
[Index("Entity", "User", "Name", Unique = true)]
public class Filter : Entity
{
    /// <summary>
    /// Initializes a new instance of the entity
    /// </summary>
    /// <param name="id">Unique element identifier</param>
    public Filter(Guid id)
        : base(id)
    {
    }

    [Field, Key]
    public Guid Id { get; set; }

    [Association(OnTargetRemove = OnRemoveAction.Cascade)]
    [Field(Nullable = false, NullableOnUpgrade = true)]
    public Filter Entity { get; set; }

    [Field(Nullable = false, NullableOnUpgrade = true)]
    public string Name { get; set; }

    [Field(Length = 4000)]
    public string DynamicLinqExpression { get; set; }

    [Association(OnTargetRemove = OnRemoveAction.Cascade)]
    [Field(Nullable = false, NullableOnUpgrade = true)]
    public Filter User { get; set; }

    [Field]
    public EntitySet<Filter> AvailableFor { get; set; }
}