Fix to exclude downloads of public plans with no user id associated with

download, as most of these downloads are associated with robots.

Change:
 - We exclude the cont  downloads in export_plans table for which
   user_id is nil.

CHANGELOG.md

@@ -1,5 +1,8 @@
 # Changelog
 
+### Fix
+- Fix for removing from statistics the count of the download of plans that lack an user id in exported_plans table. Most of such downloads will have been associated with robots harvesting.
+
 ## v4.2.0
 
 **Note this upgrade is mainly a migration from Bootstrap 3 to Bootstrap 5.** 

app/models/stat_exported_plan/create_or_update.rb

@@ -40,9 +40,11 @@ def org_plan_ids(org_id:, filtered:)
             .uniq
       end
 
+      # Exclude plans harvested by robots, by excluding plans that have a user_id nil.
       def exported_plans(start_date:, end_date:, org_id:, filtered:)
         ExportedPlan.where(plan_id: org_plan_ids(org_id: org_id, filtered: filtered))
                     .where(created_at: start_date..end_date)
+                    .where.not(user_id: nil)
                     .count
       end
     end