Hire date and assignment start date different - feasible for new employees?

Summary:

I need to create a new employee with hire date and assignment start date different and using HDL process. However, the process is not allowing saying they have to be the same. Functionally, this is a valid scenario and any pointers is helpful?

Content (required):

I need to create a new employee with hire date and assignment start date different and using HDL process. However, the process is not allowing saying they have to be the same. Functionally, this is a valid scenario and any pointers is helpful?

Attaching sample HDL file.

Version (include the version you are using, if applicable):