Export ledger r1 amount different from gstr-1 6a

Preeti (Executive - GST) (22 Points)

22 May 2019  

My Export refund is pending due to following mismatch of Export ledger amounts

IGST Amount for the Export in GSTR-1 and GSTR-3B is same. No difference, but when I see Export Ledger R1 amount is difference.

IGST for Export in GSTR-1 and GSTR-3B is 4113377

IGST in Export ledger is 4077176

What is the reason for this difference