diff --git a/src/blackboard/db.py b/src/blackboard/db.py
index 4016bfd..a59ac73 100644
--- a/src/blackboard/db.py
+++ b/src/blackboard/db.py
@@ -14,6 +14,8 @@ def init_db(db_path: Path) -> None:
     try:
         for stmt in _SCHEMA_STATEMENTS:
             conn.execute(stmt)
+        # v2.6.1 迁移：旧 DB 可能缺少新字段
+        _migrate_v261(conn)
         conn.commit()
     finally:
         conn.close()