Customization on the Payroll interface using Global Payroll Interface template to add Assignment id

Summary:

I have created a custom Payroll Interface using the Global Payroll Interface template. Selected all fields but need assignment id under the Service information which is using ORA_HRY_CONFIG_CONTEXT_UE. I am trying to add assignment id under this Data group. When I used the DBI "Validation Extract Assignment Number" it is giving me latest assignment id. How can I fetch the right assignment id ?

Content (required):

Which DBI should I use to get the appropriate assignment id under the Service Information ? There are no other Assignment number DBIs here under the ORA_HRY_CONFIG_CONTEXT_UE.