Fatal error in uninstallation

HI
I have reproduce the above module on my local & install.
Then as you said when uninstall the module, we'll get the fatal error.

An error was reported because the added field already has data and has not been deleted. The next step is to address this issue.

ok... but instead of error 500 we should get an error in admin syaing that, don't you agree?
cheers

Please update to version 2.0.2.