... because, instead of removing the mention that Metroid: Other M was the newest game in the franchise, you removed all of the description of Metroid: Other M. If we allowed that edit, we would just have to put the information back (other than the statement about it being the newest game in the franchise).
We have no problem with removing incorrect data, but we do have a problem with removing correct data.
You aren't in trouble. Everybody's allowed one mistake. And if you want to make another edit that removes only the statement that Other M is the newest game in the series, we'll let that through.