Stacked and stretched dark calibrated image, has a streak in it

Not sure if this is light getting in? I had the the cap on the camera so not even the lens cap. I have linked the stretched and stacked calibration images. I used a Canon T8i, Rokinon 135mm with an L-enahance filter that was never removed. The stacked images are processed using the Siril HaOIII extract script.