Esri Roads and Highways provides the functionality to upgrade an linear referencing system (LRS) created in an earlier release of Esri Roads and Highways.
Upgrading an LRS from a Roads and Highways database
An LRS created using an earlier release of Esri Roads and Highways must be upgraded.
To upgrade the LRS, right-click it in ArcCatalog or the Catalog window in ArcMap and click Upgrade ALRS.