What occurs when an application tries to use a rule that is checked out by another developer?

When an application tries to use a rule that is checked out by another developer, it defaults to using the previous version of that rule. This behavior ensures that applications can continue to function and process cases without interruption, maintaining stability even when changes are being made. The versioning system in Pega allows for collaboration among developers while safeguarding the application’s operational integrity.

Using the previous version of the rule prevents scenarios where a checked-out rule remains uncommitted and potentially introduces instability or unwanted behaviors. This design maintains continuous application availability and helps teams work together by enabling developers to make their adjustments without affecting the live system.