Transaction

[Error Code: 1101] error caused by: 1 error occurred:
	* transaction execute failed: [Error Code: 1101] cadence runtime error: Execution failed:
  --> 86abef23fb1b8e8a05a3e70f45200a7a1d442933457a21477c6be71deca79709:17:8
   |
17 |         tryBI(tokenInVault: flowTokenVault)
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: underflow
  --> 86abef23fb1b8e8a05a3e70f45200a7a1d442933457a21477c6be71deca79709:29:24
   |
29 |     let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^