The architect should create a package of the affected entity, which includes the delivery meta data, such as the period and delivery validity, in the package definition. This will ensure that the original delivery properties are preserved and can be easily redeployed for testing. The package should also include other relevant information such as the entity definition, business rules, and workflow processes.
Additionally, it is good practice for the Architect to keep track of the changes made to the package and delivery properties through version control and configuration management. This will help to easily revert to a previous version of the package if needed.