Hello Raj Shekar,
Please check the payment terms assigned in the invoice and vendor master data. According to that payment terms is your invoice become due or not. Pls chk the same once and pyt terms of invoice should match with the vendor master data pyt terms assigned in the pyt transactions tab.
You can set the next payment run date properly. This date is needed in order to check the due date of payables.
After doing the necessary changes pls chk this item is falls under open items or not in FBL1N.
I hope it helps!
Thanks & Regards,
Lakshmi S