Sometimes get error from backtesting on Exit

[DogsTailFarmer]

Environment (please complete the following information):

• Version 3.0.12
• OS: [e.g. Ubuntu 22.04]

Describe the bug
^C14/08 08:40:35 Got signal for exit
14/08 08:40:35 Backtest process was terminated
14/08 08:40:35 Backtest control: '_value'
14/08 08:40:35 Exception traceback: Traceback (most recent call last):
File "/home/ubuntu/.local/lib/python3.10/site-packages/martin_binance/strategy_base.py", line 357, in backtest_control
f" predicted value {prm_best.pop('_value')} -> {prm_best.pop('new_value')}",
KeyError: '_value'

14/08 08:40:35 Backtest data collect and optimize session ended