How to update a field of Worker details in Assignment using HDL in HCM?

Summary

Getting error while uploading HDL file to update assignment metadata in worker.dat file

Content

Hello

Can anyone tell how to update Worker details in Assignment Metadata using HDL?

I tried creating a worker dat file to update the field in Assignment Metadata. But getting the error

I provided Source system owner, source system id, personid, period of service id

But the personId and Period of service Id reference of parent record not found. What are the foreign key attributes to be provided and where to get that data ?

Please find the attached zip file of Assignment Update. Please look into dat file let me know the error.