diff --git a/doc/sql/transport/blade_mp_user_20261012.sql b/doc/sql/transport/blade_mp_user_20261012.sql
index 32e2d94a..ff7ca12e 100644
--- a/doc/sql/transport/blade_mp_user_20261012.sql
+++ b/doc/sql/transport/blade_mp_user_20261012.sql
@@ -31,7 +31,7 @@ CREATE TABLE IF NOT EXISTS `blade_mp_user` (
   `is_deleted` int NULL DEFAULT 0 COMMENT '是否已删除',
   PRIMARY KEY (`id`) USING BTREE,
   UNIQUE KEY `uk_mp_user_tenant_phone` (`tenant_id`, `phone`) USING BTREE,
-  UNIQUE KEY `uk_mp_user_tenant_openid` (`tenant_id`, `openid`) USING BTREE,
+  KEY `idx_mp_user_openid` (`tenant_id`, `openid`) USING BTREE,
   KEY `idx_mp_user_account` (`tenant_id`, `account`) USING BTREE,
   KEY `idx_mp_user_identities` (`identities`) USING BTREE
 ) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci COMMENT = '小程序用户表';
diff --git a/doc/sql/transport/blade_mp_user_openid_index_20261026.sql b/doc/sql/transport/blade_mp_user_openid_index_20261026.sql
new file mode 100644
index 00000000..044ade03
--- /dev/null
+++ b/doc/sql/transport/blade_mp_user_openid_index_20261026.sql
@@ -0,0 +1,8 @@
+-- 小程序用户表 openid 索引：唯一键 uk_mp_user_tenant_openid 改为普通索引 idx_mp_user_openid(tenant_id, openid)
+-- openid 是「该账号最近一次登录用的微信」的留痕，不是账号标识：允许为空，允许多个账号留下同一个 openid
+-- 回滚（加回唯一键）前必须先把重复的 openid 置 NULL，否则唯一键 DDL 直接失败
+-- 部署时在业务库执行本脚本
+
+ALTER TABLE `blade_mp_user`
+  DROP INDEX `uk_mp_user_tenant_openid`,
+  ADD INDEX `idx_mp_user_openid` (`tenant_id`, `openid`) USING BTREE;