add Payment to invoice results in error 10081

add Payment to invoice results in error 10081

Hello

I dont know why i get this error. I try do add a payment to an invoice via the api!

https://invoice.zoho.com/api/payments/create

The ammount of the payment is equal to the ammount of the invoice but in my response i get an error with code 10081 which tells me that the ammount of the payment is higher than the ammount of the invoice! Dont know why because the values are equal.! The next thing is this error only occurs sometimes.

Whats wrong here?