The phrase "to precede any discussion" means that something needs to happen or be said before a conversation or talk begins. It is like an introduction or a starting point that sets the stage for further discussion. Full definition
An overview of the model precedes a discussion of related research and outcomes. (childwelfare.gov)
However, as clear from preceding discussion, the story of Afghanistan still revolves around a host of ifs and buts. (blog.politics.ox.ac.uk)
In an editorial published in the Wall Street Journal preceding the discussion draft's release, Camp said: «If Congress doesn't take action, the U.S. risks falling further behind. (crfb.org)