Transaction

[Error Code: 1101] error caused by: 1 error occurred:
	* transaction execute failed: [Error Code: 1101] cadence runtime error: Execution failed:
  --> d6207725ce940d51edbea591238af383267ebbba978e9c902d47fee7a731c159:17:8
   |
17 |         tryBI(tokenInVault: flowTokenVault)
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: underflow
  --> d6207725ce940d51edbea591238af383267ebbba978e9c902d47fee7a731c159:29:24
   |
29 |     let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^