各位大神好，今天尝试在UI界面的配置选项下，希望将sqlite 变更成mysql,可能是因为名字的大小写有问题，当我退出再次进入的时候已经不能运行run.py文件报错如下：
ValueError: 'MySQL' is not a valid Driver
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "run.py", line 33, in <module>
from vnpy.app.cta_strategy import CtaStrategyApp
File "/home/soda/miniconda3/lib/python3.7/site-packages/vnpy/app/cta_strategy/init.py", line 9, in <module>
from .engine import CtaEngine
File "/home/soda/miniconda3/lib/python3.7/site-packages/vnpy/app/cta_strategy/engine.py", line 39, in <module>
from vnpy.trader.database import database_manager
File "/home/soda/miniconda3/lib/python3.7/site-packages/vnpy/trader/database/init.py", line 12, in <module>
database_manager: "BaseDatabaseManager" = init(settings=settings)
File "/home/soda/miniconda3/lib/python3.7/site-packages/vnpy/trader/database/initialize.py", line 6, in init
driver = Driver(settings["driver"])
File "/home/soda/miniconda3/lib/python3.7/enum.py", line 310, in call
return cls.new(cls, value)
File "/home/soda/miniconda3/lib/python3.7/enum.py", line 564, in new
raise exc
File "/home/soda/miniconda3/lib/python3.7/enum.py", line 548, in new
result = cls.missing(value)
File "/home/soda/miniconda3/lib/python3.7/enum.py", line 577, in missing
raise ValueError("%r is not a valid %s" % (value, cls.name))
ValueError: 'MySQL' is not a valid Driver
我尝试寻找对应vnpy包的配置文件，发现setting文件所使用的数据库还是sqlite并没有更改，所以就不知道到底在哪错的了，也尝试重装vnpy和miniconda都没有得到解决，
谢谢解答
