# AssetManager 0.5.5.46

## MeshCentral device identity and placeholder serial numbers

- Added configurable global serial-number placeholder values.
- Added manufacturer-specific placeholder rules using `Manufacturer | Serial number`.
- Placeholder serial numbers are not used for asset matching.
- Placeholder serial numbers do not overwrite an existing asset serial number during synchronization.
- The MeshCentral node ID remains the stable unique device identity and is used before serial-number matching by default.
- The original MeshCentral source value remains available in stored source data when source-data storage is enabled.
- Dry-run and live synchronization use the same placeholder detection logic.

The default configuration includes common textual placeholders and a Synology-specific rule for `123456789` and `Unknown`.