diff --git a/rog/migrations/0011_auto_20250827_1459.py b/rog/migrations/0011_auto_20250827_1459.py
index 497e02c..d575194 100644
--- a/rog/migrations/0011_auto_20250827_1459.py
+++ b/rog/migrations/0011_auto_20250827_1459.py
@@ -79,9 +79,19 @@ class Migration(migrations.Migration):
                 'db_table': 'rog_uploaded_images',
             },
         ),
-        migrations.RemoveField(
-            model_name='teamstart',
-            name='entry',
+        # TeamStartテーブルのentryカラムを安全に削除
+        migrations.RunSQL(
+            sql="""
+            DO $$ 
+            BEGIN
+                IF EXISTS (SELECT FROM information_schema.tables WHERE table_name = 'rog_teamstart') THEN
+                    IF EXISTS (SELECT FROM information_schema.columns WHERE table_name = 'rog_teamstart' AND column_name = 'entry_id') THEN
+                        ALTER TABLE rog_teamstart DROP COLUMN entry_id;
+                    END IF;
+                END IF;
+            END $$;
+            """,
+            reverse_sql="-- No reverse SQL needed for conditional operation"
         ),
         migrations.AddField(
             model_name='entry',