F110 Issue

Dear Friends

I am trying to pay vendors through F110 (Payment methid -Check). But whenver I run the same, certain vendors are getting processed. Even though they are with a green symbol in Display Proposal, system is not picking them up and it displays a message which says - ITEM WAS RELEASED LATER.

Though everything is correct in the payment run created, this is happening again and again. Kindly throw some light on how to proceed.