Hi Martin, you should not have any problems linking other CMS items on creation. It sounds like you’re calling directly, what is the API call that you are making? I always use the item ID’s in my references.
Another option, if you’re not doing many of these requests, is to use Logic with its webhook feature. That supports a lookup by slug operation so you could potentially do something like;
- call your webhook with a new item, and a ref slug
- in logic
- lookup the slug in your ref table
- create your new item in your main collection data table using the returned ref field ID