diff --git a/app/jobs/scrape_toggl_job.rb b/app/jobs/scrape_toggl_job.rb
index 7faf5ff..86e7b68 100644
--- a/app/jobs/scrape_toggl_job.rb
+++ b/app/jobs/scrape_toggl_job.rb
@@ -31,6 +31,9 @@ class ScrapeTogglJob < ApplicationJob
     entries_data.each do |entry|
       entry_title = entry['description']
 
+      # Skip if we've already seen this entry, NOTE: we assume that there is only one inner_entry per time entry
+      next if TrackedTimeEntry.exists?(associated_toggl_entry_id: entry['time_entries'][0]['id'])
+
       if (lecture = lectures.find_by(title: entry_title))
         is_concurrent = entry['time_entries'].any? do |inner_entry|
           (Time.new(inner_entry['start']) - lecture.start_time).abs < 10.minutes