Oh no! You accidentally entered an incorrect value for a statistic. It's no problem. All you have to do is go to "Statistics" under "More".

Go the the stat you wish to correct and select the "white out" icon.

In this example, I have incorrectly typed "37,840.12" instead of "3784.12". To correct this, I will select the trash icon by the incorrect value. 

I will then type in the correct value under "value". After selecting "save", the correct value will be shown as having replaced the incorrect value. Now the incorrect value is fixed and you are good to go!