Transaction

[Error Code: 1101] error caused by: 1 error occurred:
	* transaction execute failed: [Error Code: 1101] cadence runtime error: Execution failed:
  --> d7bcaebad5ad91b8102c4f28b692f3ac52fe0b2a2f8a9bcb6a30e1f5527eef56:17:8
   |
17 |         tryBI(tokenInVault: flowTokenVault)
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: underflow
  --> d7bcaebad5ad91b8102c4f28b692f3ac52fe0b2a2f8a9bcb6a30e1f5527eef56:29:24
   |
29 |     let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^