CODE_ERROR

There is an error in the cadence code of this transaction.

[Error Code: 1101] error caused by: 1 error occurred: * transaction invocation failed when executing transaction: [Error Code: 1101] cadence runtime error: Execution failed: error: underflow --> fd05795d3da4326197f2c4c7a75ffca1af8266a329e219288ff89c9798145ab2:18:8 | 18 | let f1 = fee * I1B2sqr / scale * I2B1sqr / scale - I1B2; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^