RequesterId not working in SQL statement on DFF of Requisition Lines

Summary:

We want to default the DFF (attribute1) on Requisition Lines with the requestor information.

Content (please ensure you mask any confidential information):

On Requisition line we get the requesterId , the requester is assigned an expense account.

Based on below code we are fetching the segment2 from the requestor expense information but facing below error message.

Can someone please explain where is the error ?

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

Code Snippet (add any code snippets that support your topic, if applicable):

select 

gcc.segment2 

from 

gl_code_combinations gcc,

per_all_assignments_m paam,

por_requisition_headers_all prha,