Can't change the size of the current bet

[zaxcon]

Hi!
I want to change the size of the current bet
JSON Request {"jsonrpc":"2.0","method":"SportsAPING/v1.0/cancelOrders","params":{"marketId":"1.156378117"," instructions":[{"betId":"159692939096","sizeReduction":"10"}]},"id":1}
In response to receiving BET_ACTION_ERROR. What am I doing wrong

[jabe]

Just to check, was the original bet a limit order? I've had a quick look at the documentation and can't make out whether £10* is the new stake or the amount the stake is being reduced by. What was the previous size?


* or whatever currency you're using