Reversal in Account Statement

Hi,
my question is related to befair only, it has nothing to do with MFPro. But as there are very smart experts around, I hope somebody can help with this issue.

Today I found a line in my account statement (as I searched for last weeks premium charges)

I have no idea why I have this reversal transaction in my statement. Overall P/L in UEFA Chanpions league market increased by the amout of the reversal.

kind regards
Martin

Martin
That market was suspended and reopened around the time of the statement entry. Interestingly the quarter final market is still suspended at the time of writing. Possibly an appeal of some sort? Could this have anything to with Betfair pre-settling some markets and then reversing it?
T&C extract
"If Betfair resettles a market, this may lead to amendments being made to a customer's balance to reflect changes in market settlement."