Error 20409 When Trying to Create a Conversation Address in Flex and Conversations – Twilio Support

Issue

Unable to create Conversation Address in Flex and Conversations – Error 20409: Conflict or Something went wrong creating the address configuration.

Product

Conversations Classic

Cause

The issue typically occurs when customers transfer phone numbers (such as WhatsApp, SMS, etc.) from one Twilio Account to another, but the address configuration associated with the numbers is not removed from the original Twilio Account.

Resolution

To resolve this issue, ensure that any address configuration associated with the transferred sender is removed from the original (old) Twilio Account:

Fetch active configurations for old Twilio Account using GET https://conversations.twilio.com/v1/Configuration/Addresses

curl -X GET "https://conversations.twilio.com/v1/Configuration/Addresses?PageSize=20" \
-u $TWILIO_ACCOUNT_SID:$TWILIO_AUTH_TOKEN

2. Identify the configuration address SID linked to the affected number.

3. Use the SID obtained in step 2 to delete the configuration from the old account. This will allow the address configuration to be added to the new account without conflict.

curl -X DELETE "https://conversations.twilio.com/v1/Configuration/Addresses/IGXXXXXXXXXXXXXXXXXXX" \
-u $TWILIO_ACCOUNT_SID:$TWILIO_AUTH_TOKEN