AC21 - Which Job title to use (Labor or I-140) Urgent

special485

Registered Users (C)
Labor was initially approved with Job title "Programmer Analyst". Then I-140 was filed based on that substituted LC using job title as "Systems Analyst", but in both cases the job description was the same. Which job title should i use at this time to file AC21 Employment verification letter RFE. Please reply.
 
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