diff --git a/src/main/java/com/heai/modules/grid/service/impl/GridTableUserServiceImpl.java b/src/main/java/com/heai/modules/grid/service/impl/GridTableUserServiceImpl.java
index e3358fb..4a4bd74 100644
--- a/src/main/java/com/heai/modules/grid/service/impl/GridTableUserServiceImpl.java
+++ b/src/main/java/com/heai/modules/grid/service/impl/GridTableUserServiceImpl.java
@@ -11,6 +11,7 @@ import org.springframework.transaction.annotation.Transactional;
 
 import java.util.ArrayList;
 import java.util.Comparator;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 import java.util.stream.Collectors;
@@ -28,15 +29,21 @@ public class GridTableUserServiceImpl extends ServiceImpl<GridTableUserDao, Grid
             return;
         }
         GridTableUser first = gridTableUsers.get(0);
-        // 用"整组替换"代替逐行 update，减少锁竞争和死锁概率
+        // 用“整组替换”代替逐行 update，减少锁竞争和死锁概率
         lambdaUpdate()
                 .eq(GridTableUser::getUserId, first.getUserId())
                 .eq(GridTableUser::getFunctionId, first.getFunctionId())
                 .eq(GridTableUser::getTableId, first.getTableId())
                 .remove();
-
-        gridTableUsers.sort(Comparator.comparing(GridTableUser::getSortLv, Comparator.nullsLast(Integer::compareTo)));
-        this.saveBatch(gridTableUsers);
+    
+        // 按 columnProp 去重：防止 grid_table_default 历史重复行传播到 user 表
+        Set<String> seen = new HashSet<>();
+        List<GridTableUser> deduped = gridTableUsers.stream()
+                .filter(item -> seen.add(item.getColumnProp()))
+                .sorted(Comparator.comparing(GridTableUser::getSortLv, Comparator.nullsLast(Integer::compareTo)))
+                .collect(Collectors.toList());
+    
+        this.saveBatch(deduped);
     }