Transaction

[Error Code: 1101] error caused by: 1 error occurred:
	* transaction execute failed: [Error Code: 1101] cadence runtime error: Execution failed:
  --> 21ae90e01a9e973d3031096f7be3c5db5baab9016ccdafb23a93ede6859d6c89:22:11
   |
22 |         if tryBM(tokenInVault: flowTokenVault) {
   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: underflow
  --> 21ae90e01a9e973d3031096f7be3c5db5baab9016ccdafb23a93ede6859d6c89:92:24
   |
92 |     let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^