reverse cust ledge entry from chart of account error

Hi guys when i go to financial management -chart of account -cash on hand -net change then select on entries then reverse transaction then error message show to me "you cannot reverse ledger entry no xx because the the entry is either applied to an entry or has been changed by batch job why this problem made and how i will solve

thanks

Error clearly show that particualr payment entry is applied against particular Invoice.

First unapply the same and then do the reversal.

ok you are true but there are three entry with same document no and quantity which one i will un applied.2 entries g/l entry and one customer ledg entry which one i can make unapplied

I thank you very much for interest

You need to decide.