Skip to main content
N
Contributor I
Numo Mfg
Contributor I
January 20, 2025
Solved

Uploading a list but it deleted existing files- need to keep them in this list

  • January 20, 2025
  • 2 replies
  • 97 views

I was trying to upload a list from a recent trade show because we wanted to send a thank you email to the people who stopped by our booth. About one-quarter of the list was deleted from this upload because their profile already exists in the Klaviyo system. We really want to keep all of the people in this list together so we can send them one email. Does anyone have a solution or workaround to this? I have tried looking in the academy and this community but have not found anything on this subject. 

Best answer by retention

Hi ​@Numo Mfg, welcome to the community!

As you mention, Klaviyo automatically de-duplicates any email addresses in a given List by design.  I’m assuming this List is your main or primary List that you use (e.g Newsletter or Main).  It’s good to make sure all Profiles are uploaded to a singular main list.

However, in this case, what I recommend you do is to create a temporary new List and import it there instead (e.g. “Tradeshow 2025”) since this is a very specific one-time Campaign.  Then you can create your “Thank You Campaign” and designate that temporary List as your audience for this Campaign that will reach anyone on your List (from a pre-existing profile, or a new one) of tradeshow attendees.  Just note, a profile can belong to multiple Lists or Segments and only be counted once as an Active Profile.

Hope this helps!

2 replies

retention
Partner - Platinum
retentionAnswer
2025 Champion
January 20, 2025

Hi ​@Numo Mfg, welcome to the community!

As you mention, Klaviyo automatically de-duplicates any email addresses in a given List by design.  I’m assuming this List is your main or primary List that you use (e.g Newsletter or Main).  It’s good to make sure all Profiles are uploaded to a singular main list.

However, in this case, what I recommend you do is to create a temporary new List and import it there instead (e.g. “Tradeshow 2025”) since this is a very specific one-time Campaign.  Then you can create your “Thank You Campaign” and designate that temporary List as your audience for this Campaign that will reach anyone on your List (from a pre-existing profile, or a new one) of tradeshow attendees.  Just note, a profile can belong to multiple Lists or Segments and only be counted once as an Active Profile.

Hope this helps!

Joseph Hsieh // retentioncommerce.com // X: @retention
    N
    Contributor I
    Numo MfgAuthor
    Contributor I
    January 21, 2025

    Hi Joseph-

    Thanks for the response and the welcome. I tried to upload the CSV from the tradeshow as a new list and called it such so we could only email them separately.  I did not try to add into our main list.  When I tried uploading it into it’s own separate list, this is when it took out the duplicate contacts. 

    We are currently having issues with our main list. Our developers updated it a few weeks ago and have been trying to fix it. Not sure if this is the issue with this new list because our main list is not even 100% correct? 

    Any additional help would be appreciated! Thanks! 

    Terms & ConditionsAccessibility statement

    Links & Resources

    Platforms

    Partners

    Useful Things

    About

    • Terms and Privacy |
      © 2026 Klaviyo All rights reserved. Klaviyo and the Klaviyo logo are trademarks or registered trademarks of Klaviyo, Inc. or its affiliates.