Problem when importing to unity

I’ve imported a couple of animation spritew sheet in unity without any problem. but the last I create comes out blurry. I cant really use it since all the character animation are sharp, but when the “dying animation” play, it gets blurry. the thing is, when i open the sprite sheet in windows picture, it is as sharp as my other animation. i feel like its because the image is too long since its only one animation of 18 frames (2048x89 pixels)

here is the image in the sprite editor of unity :

i cant find a solution so if any one as one, it would be greatly appreciated.,
Thanks !

When importing your images, make sure the Filter mode is set to Point Filter. By default, Unity will use one of the other filter modes, which produce smoother results for non-pixel art, but which will blur pixel art.