Question
Color Primaries grayed out when exporting

Hello!
I have been trying to get access to the Color Primaries before exporting in Premire Pro, but this is always grey out. I have tried many things but still I can't . I am trying to cuange it to rec 709 . If someone had the same issue or could give me a clue on how to get acces to it please. Thank you very much in advance 🙏
