Please Help guys 

This error usually means you are trying to create a new profile that has an email address of a profile that already exists in the Klaviyo account.

The [409] A profile already exists with one of these identifiers error means you're trying to create a new profile with an email address (or another unique identifier) that already exists in your Klaviyo account.as ​@saulblum says let me provide more  the details

Here’s how to resolve it:

1. Check for Existing Profiles

• Even if your list appears empty, the profile might exist in your account but isn’t associated with a specific list.
• Use the Search Profiles feature in Klaviyo to check if the email or identifier already exists.

2. Update Instead of Create

• If the profile exists, use the Update Profile API instead of creating a new one.
• Example API call:

  json

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  { "email": "existing_email@example.com", "properties": { "FirstName": "New First Name", "LastName": "New Last Name" } }

3. API Reference

• Use the Identify Profile API to create or update a profile dynamically.
• Example cURL:

  bash

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  curl -X POST https://a.klaviyo.com/api/identify \ -H "Content-Type: application/json" \ -d '{ "api_key": "YOUR_API_KEY", "properties": { "$email": "user@example.com", "FirstName": "John", "LastName": "Doe" } }'

4. If the Profile Should Not Exist

• If you’re certain the profile shouldn’t exist, delete it via the Delete Profile API before creating a new one.

Would you like help writing a specific API call or debugging further?

Best regard 

micheal expert

klaviyo and shopify expert

Hey ​@Mich expert, thansk a lot man.
I tried also to join on whatsapp.
Also I have this error on update profile API, latest update: https://developers.klaviyo.com/en/reference/update_profile
I would like help to write it please yes, and I would like also to know how I can filter the profiles to add or not depending on another module

Hello ​@Youss , thanks for reaching out. The 409 error indicates a conflict, often caused by an existing profile with the same identifier, even if not visible in your list. Check for duplicates or orphaned data via the API. Ensure you're using the correct API endpoint to fetch existing profiles before creating a new one. For the data part, refer to the API documentation for the required structure and payload.

If this seems complex, feel free to reach out for personalized implementation assistance.

Hello ​@Youss , thanks for reaching out. The 409 error indicates a conflict, often caused by an existing profile with the same identifier, even if not visible in your list. 

Sure, happy to help with the Update Profile API and filtering logic!

Using Klaviyo's Update Profile API

Here’s how to structure the API call to update a profile:

API Endpoint

https://a.klaviyo.com/api/profiles/<PROFILE_ID>/
Replace <PROFILE_ID> with the unique identifier of the profile you want to update.

Example Request (cURL)

bash

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curl -X PATCH https://a.klaviyo.com/api/profiles/<PROFILE_ID>/ \ -H "Content-Type: application/json" \ -H "Authorization: Klaviyo-API-Key <YOUR_API_KEY>" \ -d '{ "properties": { "FirstName": "John", "LastName": "Doe", "CustomField": "CustomValue" } }'

• <PROFILE_ID>: Get this via the Search Profiles API using the email or other identifiers.
• Authorization: Replace <YOUR_API_KEY> with your private Klaviyo API key.

How to Filter Profiles Before Adding/Updating

You can use the Search Profiles API to check if a profile exists and make decisions based on its data.

Search Profiles API Example

bash

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curl -X GET "https://a.klaviyo.com/api/profiles/?email=user@example.com" \ -H "Authorization: Klaviyo-API-Key <YOUR_API_KEY>"

• If the profile exists: Use the PATCH method to update it.
• If the profile does not exist: Use the Identify API to create a new one.

Automate Filtering Logic

Here’s a Python example for automating the process:

python

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import requests API_KEY = "YOUR_API_KEY" BASE_URL = "https://a.klaviyo.com/api/" def get_profile_by_email(email): response = requests.get( f"{BASE_URL}profiles/", params={"email": email}, headers={"Authorization": f"Klaviyo-API-Key {API_KEY}"} ) return response.json() def update_or_create_profile(email, properties): profile = get_profile_by_email(email) if profile 'data']: # Update the existing profile profile_id = profiled'data']i0]['id'] response = requests.patch( f"{BASE_URL}profiles/{profile_id}/", json={"properties": properties}, headers={"Authorization": f"Klaviyo-API-Key {API_KEY}"} ) else: # Create a new profile response = requests.post( f"{BASE_URL}identify", json={"api_key": API_KEY, "properties": {"$email": email, **properties}} ) return response.json() # Example usage email = "user@example.com" properties = { "FirstName": "Jane", "LastName": "Doe", "CustomField": "Value" } response = update_or_create_profile(email, properties) print(response)

If the issue still continue you can reach out to me