diff --git a/v2/history/2026-06-12.md b/v2/history/2026-06-12.md
index 4b94cdf..2d268fb 100644
--- a/v2/history/2026-06-12.md
+++ b/v2/history/2026-06-12.md
@@ -127,3 +127,35 @@ v2/src/
 ├── db/                 # pool, queries, schema
 └── validators/index.js # CIDR validate
 ```
+
+---
+
+## ⚠️ ПРИ ИНТЕГРАЦИИ — что переименовать
+
+### Таблицы (префикс `v2_` → убрать)
+```
+v2_companies  → companies
+v2_entries    → whitelist_entries
+v2_audit      → audit_log
+```
+Причина: PostgreSQL один на всё приложение.
+
+### Сессия — НЕ трогать (уже без префикса)
+```
+req.session.user         ← одинаково в v2 и основном коде
+req.session.token
+req.session.adminMode
+```
+
+### req.v2_* контекст — убрать префикс
+```
+req.v2_email       → req.email
+req.v2_clientId    → req.clientId
+req.v2_isAdmin     → req.isAdmin
+req.v2_isImpersonated → req.isImpersonated
+req.v2_impersonatedBy → req.impersonatedBy
+req.v2_allClientIds   → req.allClientIds
+req.v2_profiles    → req.profiles
+req.v2_companyName → req.companyName
+```
+Причина: в основном коде нет префиксов.