Hi @netfreak
Please keep in mind that ACF saves two entries in the database: the value and the reference. The value looks like this:
field_name : field value
While the reference looks like this:
_field_name : field_1234567890abc
Where ‘field_1234567890abc’ is the field key.
The issue you have mostly because the reference entries are not updated yet. You need to change the old field key with the new one. One method to do that is by using MySQL query. Please don’t forget to backup your site and database if you want to do that.
I hope this helps 🙂
