A new Form region type provides superior functionality compared to the old legacy form pages.
A new Form region type provides support for internal and external data sources (that is, Local Database, REST Enabled SQL Service, or Web Source). Forms can be created on SQL queries, or by creating PL/SQL Functions returning SQL Queries. In addition, this new Form region type supports more than two Primary Key Columns and includes more control on Lost Update detection and Row Locking. Finally you can migrate existing legacy form pages to the new form region with the Upgrade Application function in App Builder Utilities.