ACF type changes

Hi !
I’m French so I apologize if my English is not perfect 😉
In fact, I am using your plugin for my website and I set up some type for my ACF items and your plugin is changing it.
For example, I have an ACF called Conferences with a couple of items, as usual it have a name, the author (so me !), a type and the date of publication. But in the json file, the type is no longer “Tuesday” for example but “Conferences”. I’ve searched in every endpoints possible I can’t find my type. I don’t know if it is clear but could you help me please ?