Do I Need to Disable The Shopify Messenger Messages or Sales Channel?

This article will clarify the connection between Recart and Shopify Messenger features and will help you avoid duplicated messages.

Recart's Messenger feature and Shopify's Messenger Sales Channel works perfectly even on the same Facebook page. 

You don't have to turn off the entire Messenger sales channel, but you have to disable the Messenger updates on your Shopify Admin: 

You'll find the Messenger settings on your Shopify Admin - Messenger. Click Disable and now you can enable all Recart conversation flows - you won't send duplicated messages.