Transaction

[Error Code: 1101] error caused by: 1 error occurred:
	* transaction execute failed: [Error Code: 1101] cadence runtime error: Execution failed:
  --> 950ef2dc393b72ab8b2937ab2dcdc320b98ecc47c20b4a85a25e0218fdb9743e:19:11
   |
19 |         if tryBI(tokenInVault: flowTokenVault) {
   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: underflow
  --> 950ef2dc393b72ab8b2937ab2dcdc320b98ecc47c20b4a85a25e0218fdb9743e:35:24
   |
35 |     let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^