This thread is resolved. Here is a description of the problem and solution.
Problem: I use ACF to create custom post type fields. When I go to edit the field group, every field has an error icon (red !). I do not want to translate the field group, nor the fields so there is no reason for these error icons to show. Solution: Go to each field that has that exclamation mark, select a different value for Translation preferences (like Copy, for example), select back the previous value, and Update the changes to the group.
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