Good morning 

I hope someone can help.

I have a message saying "Sales Balance disagrees with Debtors control  -£?????". 

I have found a thread on here that says try the following help pages : 

"check data warning - 'Sales/purchase aged balance disagrees with control account'

and

"journal reversal option"

But when I try a journal reversal option I get a message saying "Journal do not balance, Ensure the Debits total is the same as the Credits total"

I don't understand what this means? 

I can not delete nor edit the transaction and if I try to rectify the balance sage says that I can not post to nominal code 1100

I don't know what else to do to clear this warning message.