Hi @bpdp
Hmm.. If you look at the function acf_add_local_field_group it calls to add_field_group and in there you’ll find:
// don't allow overrides
if( acf_is_local_field_group($field_group['key']) ) {
return;
}
I’m not sure why this is there so I’m subbing in @elliot and perhaps he can explain it better and give you some tips.