When an expression rule is saved, does it delete the previous version?

When an expression rule is saved, it does not delete the previous version. Instead, Appian maintains a version history for expression rules, allowing developers to access earlier versions if needed. This version control is crucial for maintaining the integrity of the development process, as it ensures that any changes made can be reviewed or reverted if necessary. The ability to keep previous versions also facilitates collaborative work, as multiple developers can make modifications without the risk of losing previous work. This approach supports best practices in software development, ensuring stability and reliability in applications built within the Appian environment.