# Baltique OS Core 2.7.2.1
## 2.7.2 Migration Registration Repair

This cumulative overlay fixes the strict PHP type error caused by the wrong Migration Ledger argument order in release 2.7.2.

The canonical contract is restored to:

```text
migrationKey, version, filePath, status, notes, userId, details
```

The repair safely resumes an interrupted 2.7.2 installation, records migrations 247 and 248, promotes the system to at least 2.7.2.1, adds Runtime Preflight checks, repairs the original upgrade route, and preserves the previous Magdalena Studio runtime fix.