diff --git a/gongdan/migrations/0001_initial.py b/gongdan/migrations/0001_initial.py
index d456bef..cc6ccf7 100644
--- a/gongdan/migrations/0001_initial.py
+++ b/gongdan/migrations/0001_initial.py
@@ -39,7 +39,7 @@ class Migration(migrations.Migration):
             name='GongdanImage',
             fields=[
                 ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('gongdan_id', models.CharField(db_index=True, max_length=32, verbose_name='工单号冗余')),
+                ('gongdan_hao', models.CharField(db_index=True, max_length=32, verbose_name='工单号冗余')),
                 ('url', models.CharField(max_length=512, verbose_name='图片URL')),
                 ('paixu', models.IntegerField(default=0, verbose_name='排序')),
                 ('CreateTime', models.DateTimeField(auto_now_add=True)),
@@ -51,7 +51,7 @@ class Migration(migrations.Migration):
             name='GongdanShengji',
             fields=[
                 ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('gongdan_id', models.CharField(db_index=True, max_length=32, verbose_name='工单号冗余')),
+                ('gongdan_hao', models.CharField(db_index=True, max_length=32, verbose_name='工单号冗余')),
                 ('cishu', models.IntegerField(verbose_name='第几次升级')),
                 ('shuoming', models.CharField(max_length=500, verbose_name='补充说明')),
                 ('shenqingren_id', models.CharField(db_index=True, max_length=32, verbose_name='申请人')),
diff --git a/gongdan/models.py b/gongdan/models.py
index 03b180b..2766b86 100644
--- a/gongdan/models.py
+++ b/gongdan/models.py
@@ -42,7 +42,8 @@ class GongdanImage(QModel):
     gongdan = models.ForeignKey(
         Gongdan, on_delete=models.CASCADE, related_name='images', db_column='gongdan_pk',
     )
-    gongdan_id = models.CharField(max_length=32, db_index=True, verbose_name='工单号冗余')
+    # 冗余业务工单号（勿命名 gongdan_id，会与 FK 访问器冲突）
+    gongdan_hao = models.CharField(max_length=32, db_index=True, verbose_name='工单号冗余')
     url = models.CharField(max_length=512, verbose_name='图片URL')
     paixu = models.IntegerField(default=0, verbose_name='排序')
     CreateTime = models.DateTimeField(auto_now_add=True)
@@ -58,7 +59,7 @@ class GongdanShengji(QModel):
     gongdan = models.ForeignKey(
         Gongdan, on_delete=models.CASCADE, related_name='shengji_list', db_column='gongdan_pk',
     )
-    gongdan_id = models.CharField(max_length=32, db_index=True, verbose_name='工单号冗余')
+    gongdan_hao = models.CharField(max_length=32, db_index=True, verbose_name='工单号冗余')
     cishu = models.IntegerField(verbose_name='第几次升级')
     shuoming = models.CharField(max_length=500, verbose_name='补充说明')
     shenqingren_id = models.CharField(max_length=32, db_index=True, verbose_name='申请人')
diff --git a/gongdan/services.py b/gongdan/services.py
index c870234..c15ef0c 100644
--- a/gongdan/services.py
+++ b/gongdan/services.py
@@ -132,7 +132,7 @@ def _replace_images(gd, image_urls):
     for i, url in enumerate(urls):
         GongdanImage.objects.create(
             gongdan=gd,
-            gongdan_id=gd.gongdan_id,
+            gongdan_hao=gd.gongdan_id,
             url=url[:512],
             paixu=i,
         )
@@ -210,7 +210,7 @@ def escalate_gongdan(*, gongdan_id, yonghuid, shuoming, image_urls=None):
     next_cishu = (gd.shengji_cishu or 0) + 1
     GongdanShengji.objects.create(
         gongdan=gd,
-        gongdan_id=gd.gongdan_id,
+        gongdan_hao=gd.gongdan_id,
         cishu=next_cishu,
         shuoming=text,
         shenqingren_id=yonghuid,