diff --git a/alembic/versions/089_viral_video_storyboard_backfill.py b/alembic/versions/089_viral_video_cols.py
similarity index 83%
rename from alembic/versions/089_viral_video_storyboard_backfill.py
rename to alembic/versions/089_viral_video_cols.py
index 1f0786919..31e45382f 100644
--- a/alembic/versions/089_viral_video_storyboard_backfill.py
+++ b/alembic/versions/089_viral_video_cols.py
@@ -1,6 +1,6 @@
 """viral video add storyboard + generated_copy_text (complement 088)
 
-Revision ID: 089_viral_video_storyboard_backfill
+Revision ID: 089_viral_video_cols
 Revises: 088_viral_video_copy_result
 Create Date: 2026-10-01
 
@@ -14,13 +14,19 @@ import sqlalchemy as sa
 
 from alembic import op
 
-revision = "089_viral_video_storyboard_backfill"
+revision = "089_viral_video_cols"
 down_revision = "088_viral_video_copy_result"
 branch_labels = None
 depends_on = None
 
 
 def upgrade() -> None:
+    # 扩展 alembic_version.version_num 字段长度（原来 VARCHAR(32) 装不下长 revision id）
+    conn = op.get_bind()
+    try:
+        conn.execute(sa.text("ALTER TABLE alembic_version ALTER COLUMN version_num TYPE VARCHAR(256)"))
+    except Exception:
+        pass
     cols = [
         ("storyboard", "JSON"),
         ("generated_copy_text", "TEXT NOT NULL DEFAULT ''"),
@@ -30,7 +36,6 @@ def upgrade() -> None:
         ("video_model", "VARCHAR(100) NOT NULL DEFAULT ''"),
         ("copy_result", "JSON"),
     ]
-    conn = op.get_bind()
     for name, ddl in cols:
         try:
             conn.execute(sa.text(f"ALTER TABLE viral_video_jobs ADD COLUMN IF NOT EXISTS {name} {ddl}"))