Premiere Renders Red Image

Hey guys,

So I found the question/problem quite sometimes on this Forum but all the tips didn't worked.
So as I already said when I Export, Render my Video to H264 some clips are just red.
(They are original shooted with a dji Phontom 4 (4k, MOV, 23,976fps) yeah I know MOV is not good, diffrent fps then my
Sequenz:

1920x1080
25 fps

But thats not the main Problem in the Preview the footage is fine. It was even rendered correctly last month.
So I said ok, I already had it in the mp4 format when I last rendered it, took that scenes and cut them back into the Video (replaced the original scenes) and BOOM.
Same Error now with: an MP4, 1920x1080 25fps file.

I dont get it.
It also renders the CC Filters correct so the Red Color looks a little different when I have "Looks" on it.