diff --git a/Model/Tiobon.Web.pdm b/Model/Tiobon.Web.pdm
index 9230d562..77f89fdf 100644
--- a/Model/Tiobon.Web.pdm
+++ b/Model/Tiobon.Web.pdm
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<?PowerDesigner AppLocale="UTF16" ID="{C294868A-C3F3-41AD-98CC-78B6D4E0CC40}" Label="" LastModificationDate="1715578955" Name="一优开发平台" Objects="6554" Symbols="281" Target="Microsoft SQL Server 2008" Type="{CDE44E21-9669-11D1-9914-006097355D9B}" signature="PDM_DATA_MODEL_XML" version="15.0.0.2613"?>
+<?PowerDesigner AppLocale="UTF16" ID="{C294868A-C3F3-41AD-98CC-78B6D4E0CC40}" Label="" LastModificationDate="1715757534" Name="一优开发平台" Objects="6543" Symbols="281" Target="Microsoft SQL Server 2008" Type="{CDE44E21-9669-11D1-9914-006097355D9B}" signature="PDM_DATA_MODEL_XML" version="15.0.0.2613"?>
 <!-- do not edit this file -->
 
 <Model xmlns:a="attribute" xmlns:c="collection" xmlns:o="object">
@@ -108412,11 +108412,11 @@ LABL 0 Arial Unicode MS,8,N</a:FontList>
 <a:Code>CoverUrl</a:Code>
 <a:CreationDate>1714103894</a:CreationDate>
 <a:Creator>Administrator</a:Creator>
-<a:ModificationDate>1714104111</a:ModificationDate>
+<a:ModificationDate>1715757534</a:ModificationDate>
 <a:Modifier>Administrator</a:Modifier>
 <a:Comment>封面图片URL</a:Comment>
-<a:DataType>nvarchar(64)</a:DataType>
-<a:Length>64</a:Length>
+<a:DataType>nvarchar(256)</a:DataType>
+<a:Length>256</a:Length>
 </o:Column>
 <o:Column Id="o6552">
 <a:ObjectID>E06D77D6-9619-410C-8974-29B174D4297B</a:ObjectID>