Errors

list_name_taken

There is already a list with that name

Names are how a list is picked when sending a campaign, so two with the same one would be a guess about which was meant.

What to do

Pick a different name, or rename the existing list with PATCH /v1/contact-lists/{id}.

The shape

{
  "error": {
    "type": "...",
    "code": "list_name_taken",
    "message": "...",
    "docs": "https://docs.njiwa.upeo.ai/errors/list_name_taken"
  }
}