Redmine

Hi,

I'm trying to upgrade Redmine following the instructions from RedmineUpgrade. However, within the step 4, it mentions terms "Redmine 4" and "Redmine 3". What's the meaning of these terms? I suppose it may stands for the version number. But the latest version of Redmine is 3.4.1. Is that a mistake in the documentation? Please help me to understand it correctly. Thanks so much for your help in advance.

Wendy