Umbraco Version 7.2.8. When i install at last step,report error:

error code is: “/”应用程序中的服务器错误。

列名 'Path' 无效。

说明: 执行当前 Web 请求期间，出现未经处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。

异常详细信息: System.Data.SqlClient.SqlException: 列名 'Path' 无效。

源错误:

执行当前 Web 请求期间生成了未经处理的异常。可以使用下面的异常堆栈跟踪信息确定有关异常原因和发生位置的信息。

堆栈跟踪:

[SqlException (0x80131904): 列名 'Path' 无效。] System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action1 wrapCloseInAction) +1767866 System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action1 wrapCloseInAction) +5352418 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) +244 System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady) +1691 System.Data.SqlClient.SqlDataReader.TryConsumeMetaData() +61 System.Data.SqlClient.SqlDataReader.getMetaData() +90 System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) +365 System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, SqlDataReader ds) +1406 System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource1 completion, Int32 timeout, Task& task, Boolean asyncWrite) +177 System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) +53 System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) +134 System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior) +41 System.Data.Common.DbCommand.ExecuteReader(CommandBehavior behavior) +10 StackExchange.Profiling.Data.ProfiledDbCommand.ExecuteDbDataReader(CommandBehavior behavior) +68 System.Data.Common.DbCommand.System.Data.IDbCommand.ExecuteReader() +12 Umbraco.Core.Persistence.<Query>d__71.MoveNext() +262 System.Collections.Generic.List1..ctor(IEnumerable1 collection) +381 System.Linq.Enumerable.ToList(IEnumerable1 source) +58 Umbraco.Core.Persistence.Database.Fetch(String sql, Object[] args) +94 Umbraco.Core.Persistence.Database.Page(Int64 page, Int64 itemsPerPage, String sql, Object[] args) +303 Umbraco.Core.Persistence.Database.Page(Int64 page, Int64 itemsPerPage, Sql sql) +91 Umbraco.Core.Persistence.Repositories.VersionableRepositoryBase2.GetPagedResultsByQuery(IQuery1 query, Int32 pageIndex, Int32 pageSize, Int32& totalRecords, Tuple2 nodeIdSelect, Func2 processQuery, String orderBy, Direction orderDirection, Func1 defaultFilter) +401 Umbraco.Core.Persistence.Repositories.ContentRepository.GetPagedResultsByQuery(IQuery1 query, Int32 pageIndex, Int32 pageSize, Int32& totalRecords, String orderBy, Direction orderDirection, String filter) +471 Umbraco.Core.Services.ContentService.GetPagedDescendants(Int32 id, Int32 pageIndex, Int32 pageSize, Int32& totalChildren, String orderBy, Direction orderDirection, String filter) +735 UmbracoExamine.UmbracoContentIndexer.PerformIndexAll(String type) +263 Examine.LuceneEngine.Providers.LuceneIndexer.IndexAll(String type) +126 UmbracoExamine.BaseUmbracoIndexer.IndexAll(String type) +29 UmbracoExamine.BaseUmbracoIndexer.PerformIndexRebuild() +80 Examine.LuceneEngine.Providers.LuceneIndexer.RebuildIndex() +92 UmbracoExamine.UmbracoContentIndexer.RebuildIndex() +53 Umbraco.Web.WebBootManager.Complete(Action1 afterComplete) +238 Umbraco.Core.UmbracoApplicationBase.StartApplication(Object sender, EventArgs e) +241 Umbraco.Core.UmbracoApplicationBase.ApplicationStart(Object sender, EventArgs e) +9

[HttpException (0x80004005): 列名 'Path' 无效。] System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app) +9936485 System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +118 System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +172 System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +336 System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +296

[HttpException (0x80004005): 列名 'Path' 无效。] System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +9950728 System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +101 System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +254

Is this a bug?