unable to apply a payment to receipt

Summary:

Unable to unapply a line from receipts UI

Content (required):

we had an invoice of $80K and we created 2 Chargebacks of about $3000.We received payment of about $100K and now we want to unapply one payment line and it is throwing an error message below:

The chargeback associated with this receipt can't be updated. (AR-855411)

The chargebacks created for $3000 has been reversed and now when i goto receipt and unapply particular line i am getting above error and i performed the same in lower POD and i am able to see the balance in invoice for about $80K but in PROD its throwing an error.Not sure what i am missing here.Is it because the payment would have reconciled and chargebacks are reversed in last period?