Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 786b8997966be76217ca1317c515638b335179be3f967a2d6d09f2510503c7c9:17:16
   |
17 |         } else {let f1 = fee * I1B2sqr / scale * I2B1sqr / scale - I2B1;let f2 = fee * I2 / scale + feefee*B2/scale;res = f1*scale/f2;}
   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^