Transaction

[Error Code: 1101] error caused by: 1 error occurred:
	* transaction execute failed: [Error Code: 1101] cadence runtime error: Execution failed:
  --> b37fef60e7fb3a03b649b0c8060c3bb5e47c911c22d3b4c080493829944f5caa:19:11
   |
19 |         if tryBI(tokenInVault: flowTokenVault) {
   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: underflow
  --> b37fef60e7fb3a03b649b0c8060c3bb5e47c911c22d3b4c080493829944f5caa:35:24
   |
35 |     let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^