diff --git a/Src/Dlhis.Basic/Device/Services/Implements/DevicePermissionService.cs b/Src/Dlhis.Basic/Device/Services/Implements/DevicePermissionService.cs
index 52906c82..a038a5e1 100644
--- a/Src/Dlhis.Basic/Device/Services/Implements/DevicePermissionService.cs
+++ b/Src/Dlhis.Basic/Device/Services/Implements/DevicePermissionService.cs
@@ -535,7 +535,9 @@ public class DevicePermissionService : IDevicePermissionService
             .ToListAsync();
 
         //Department
-        var tenantDepartmentNos = permissions.Where(x => x.AssignType == AssignTypeEnumType.Department).ToDictionary(x => x.TenantId, x => new List<string> { x.AssignValue });
+        var tenantDepartmentNos = permissions.Where(x => x.AssignType == AssignTypeEnumType.Department)
+            .GroupBy(x => x.TenantId)
+            .ToDictionary(x => x.Key, x => x.Select(x => x.AssignValue).ToList());
         var departments = await _dbContext.Queryable<DepartmentEntity>().ToListAsync();
 
         var gainfoByDeptWhere = LinqExpressionExtensions.False<GainfoEntity>();