diff --git a/bonus-modules/bonus-system/src/main/java/com/bonus/system/service/impl/SysDeptServiceImpl.java b/bonus-modules/bonus-system/src/main/java/com/bonus/system/service/impl/SysDeptServiceImpl.java
index 63a18aa..03b8e4d 100644
--- a/bonus-modules/bonus-system/src/main/java/com/bonus/system/service/impl/SysDeptServiceImpl.java
+++ b/bonus-modules/bonus-system/src/main/java/com/bonus/system/service/impl/SysDeptServiceImpl.java
@@ -184,7 +184,10 @@ public class SysDeptServiceImpl implements ISysDeptService
     public boolean checkDeptNameUnique(SysDept dept)
     {
         Long deptId = StringUtils.isNull(dept.getDeptId()) ? -1L : dept.getDeptId();
-        SysDept info = deptMapper.checkDeptNameUnique(dept.getDeptName(), dept.getParentId());
+        //如果没有parentid则认为是根节点，检查根节点是否重名，added by weiweiwang 2024/9/20
+        Long parentId = StringUtils.isNull(dept.getParentId()) ? 0L : dept.getParentId();
+
+        SysDept info = deptMapper.checkDeptNameUnique(dept.getDeptName(), parentId);
         if (StringUtils.isNotNull(info) && info.getDeptId().longValue() != deptId.longValue())
         {
             return UserConstants.NOT_UNIQUE;