The problem is that it has the project *box* but isn't managed by the project. (For more information about project boxes see Help: Project Boxes.)
The solution is to use a sticker instead. The Russian Roots stickers are described here: https://www.wikitree.com/wiki/Space:Russian_Roots_Project_sticker_templates
Since the only source is a vague reference to a personal "binder", with no description of what evidence exists, adding evidence would be great!
Simply remove the project box, and replace it with this category: [[Category:Russian Roots Project Needs vital records]]. That will clear the DBE and should achieve the desired attention from someone with access to Russian sources. (Enter Russ needs into the category picker to see more potentially helpful maintenance categories.)