Could you tell me why there are minus numbers in IR?

[fei67896]

2024-10-19 18:55:00,757 [INFO ] Illicit ratio = -9223372036854774797 / 2014349 = -457883510636544.00%
2024-10-19 18:55:00,757 [INFO ] Number of nodes (holdings doing transcations) = 510567
2024-10-19 18:55:00,757 [INFO ] Number of transactions = 2014349
2024-10-19 18:55:00,757 [INFO ] Edge features being used: ['Timestamp', 'Amount Received', 'Received Currency', 'Payment Format']
2024-10-19 18:55:00,757 [INFO ] Node features being used: ['Feature'] ("Feature" is a placeholder feature of all 1s)
2024-10-19 18:55:00,812 [INFO ] number of days and transactions in the data: 3 days, 2014349 transactions
2024-10-19 18:55:00,828 [INFO ] Calculate split: [[0], [1], [2]]
2024-10-19 18:55:00,830 [INFO ] Total train samples: 55.35% || IR: 0.03% || Train days: [0]
2024-10-19 18:55:00,831 [INFO ] Total val samples: 37.45% || IR: 0.05% || Val days: [1]
2024-10-19 18:55:00,831 [INFO ] Total test samples: 7.20% || IR**: -6361867693850624.00%** || Test days: [2]
Hi, thank you for your share. Could you tell me why there are minus numbers in IR? Thank you very much!!!