Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 96cbf252caf559a1eadc33fc4b21c4b3a2b3dc429bac07627e116c2f14e8247e:23:212
   |
23 |                                         let token1Vault <- UsdcUsdtSwapPair.swapToken1ForToken2(from: <- (token0Vault as! @FiatToken.Vault));let vaultOut <- FlowSwapPair.swapToken2ForToken1(from: <- token1Vault);earn = earn + vaultOut.balance - cur;flowTokenVault.deposit(from: <- vaultOut)
   |                                                                                                                                                                                                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^