diff --git a/yy-admin-master/YY.Admin.Core/SqlSugar/SqlSugarSetup.cs b/yy-admin-master/YY.Admin.Core/SqlSugar/SqlSugarSetup.cs
index e615330..57f85f4 100644
--- a/yy-admin-master/YY.Admin.Core/SqlSugar/SqlSugarSetup.cs
+++ b/yy-admin-master/YY.Admin.Core/SqlSugar/SqlSugarSetup.cs
@@ -18,6 +18,7 @@ using System.Text;
 using System.Threading.Tasks;
 using Yitter.IdGenerator;
 using YY.Admin.Core;
+using YY.Admin.Core.Const;
 using YY.Admin.Core.Extension;
 using YY.Admin.Core.Option;
 using YY.Admin.Core.SeedData;
@@ -259,6 +260,8 @@ namespace YY.Admin.Core.SqlSugar
             EnsureJeecgSysUserMirrorTable(dbProvider, config);
             // 兜底：确保 Jeecg 数据字典同构表存在（数据字典页面“同步数据字典”写入此表）
             EnsureJeecgSysDictItemMirrorTable(dbProvider, config);
+            // 兼容旧库：补齐桌面端登录设置相关 sys_config 项
+            EnsureDesktopLoginConfigSeed(dbProvider, config);
             //// 初始化视图
             //if (config.DbSettings.EnableInitView) InitView(dbProvider);
             // 初始化种子数据
@@ -389,6 +392,59 @@ namespace YY.Admin.Core.SqlSugar
             }
         }
 
+        /// <summary>
+        /// 兼容旧库：补齐桌面端「登录设置」所需的 sys_config 配置项（升级前库可能缺少这些 code）
+        /// </summary>
+        private static void EnsureDesktopLoginConfigSeed(SqlSugarScopeProvider dbProvider, DbConnectionConfig config)
+        {
+            try
+            {
+                var tableName = dbProvider.EntityMaintenance.GetEntityInfo(typeof(SysConfig)).DbTableName;
+                if (!dbProvider.DbMaintenance.IsAnyTable(tableName, false))
+                {
+                    return;
+                }
+
+                var loginConfigCodes = new HashSet<string>(StringComparer.OrdinalIgnoreCase)
+                {
+                    ConfigConst.SysTokenExpire,
+                    ConfigConst.SysRefreshTokenExpire,
+                    ConfigConst.SysTokenIdleExtendMinutes,
+                    ConfigConst.SysTokenCheckIntervalMinutes,
+                    ConfigConst.SysTokenNeverExpire,
+                };
+
+                var seedRows = new SysConfigSeedData().HasData()
+                    .Where(c => !string.IsNullOrWhiteSpace(c.Code) && loginConfigCodes.Contains(c.Code))
+                    .ToList();
+                if (seedRows.Count == 0)
+                {
+                    return;
+                }
+
+                var existingCodes = dbProvider.Queryable<SysConfig>()
+                    .Where(c => loginConfigCodes.Contains(c.Code))
+                    .Select(c => c.Code)
+                    .ToList()
+                    .Where(c => !string.IsNullOrWhiteSpace(c))
+                    .ToHashSet(StringComparer.OrdinalIgnoreCase);
+
+                var missing = seedRows
+                    .Where(s => !existingCodes.Contains(s.Code!))
+                    .ToList();
+                if (missing.Count == 0)
+                {
+                    return;
+                }
+
+                dbProvider.Insertable(missing).ExecuteCommand();
+            }
+            catch
+            {
+                // 无权限、从库只读等场景不阻断启动
+            }
+        }
+
         /// <summary>
         /// 若 sys_menu 缺少桌面默认首页标记列，则 ALTER 补齐（与实体 SysMenu.IsDefaultDesktopHome 一致）
         /// </summary>
diff --git a/yy-admin-master/YY.Admin.Services/Service/Config/SysConfigService.cs b/yy-admin-master/YY.Admin.Services/Service/Config/SysConfigService.cs
index dfc1d05..3138822 100644
--- a/yy-admin-master/YY.Admin.Services/Service/Config/SysConfigService.cs
+++ b/yy-admin-master/YY.Admin.Services/Service/Config/SysConfigService.cs
@@ -1,6 +1,7 @@
 using SqlSugar;
 using YY.Admin.Core;
 using YY.Admin.Core.Const;
+using YY.Admin.Core.SeedData;
 
 namespace YY.Admin.Services.Service.Config
 {
@@ -41,7 +42,28 @@ namespace YY.Admin.Services.Service.Config
                 .ExecuteCommandAsync();
 
             if (n <= 0)
-                return (false, "未找到对应配置项或无需更新");
+            {
+                // 旧库可能缺少新增配置项，按种子模板补插后再写入
+                var seed = new SysConfigSeedData().HasData()
+                    .FirstOrDefault(c => string.Equals(c.Code, code, StringComparison.OrdinalIgnoreCase));
+                if (seed == null)
+                    return (false, "未找到对应配置项或无需更新");
+
+                var row = new SysConfig
+                {
+                    Id = seed.Id,
+                    Name = seed.Name,
+                    Code = seed.Code,
+                    Value = value,
+                    SysFlag = seed.SysFlag,
+                    GroupCode = seed.GroupCode,
+                    OrderNo = seed.OrderNo,
+                    Remark = seed.Remark,
+                    CreateTime = DateTime.Now,
+                    UpdateTime = DateTime.Now,
+                };
+                await _dbContext.Insertable(row).ExecuteCommandAsync();
+            }
 
             _sysCacheService.Remove($"{CacheConst.KeyConfig}{code}");
             return (true, "保存成功");