2D sprite renders a small part of another one with "Sprite Mode : Multiple"

Hello,

I'm stuck with a big issue in my game :
As you can see there is a small black line on the top of the sprite (one brown square represents a pixel in the game).

Actually this black line is a part an other sprite sliced in the same spritesheet (on the top of it) :

I'm stuck because i'm already using the Filter Mode to Point :

My sprites are all stick together without any blank space, so i'm asking if there is any solution to avoid Unity to take a small pixel of other sprites, or if I have to reimport all my spritesheets with a blank separation between each sprites (i got a lot so i hope i don't have to...).

 

Hey, sorry but i come from web development and have always been using spritesheets like that (for saving maximum space as we can), I couldn't have known it will be a problem with Unity, and I noticed that only few days ago, but now I got more than hundreds of spritesheets in my project, so reimport the whole animations with a buffer zone between sprites and redo the whole slice stuff would take a lot of weeks =(

EDIT : for info anti aliasing is set to false

 

Thank you for the info, so there is no way to change that "round" to a "floor" system ?

I forget to clarify that i already have deactivated anti aliasing & anisotropic, which looks better but isn't enough.

About the pixel perfect link, I changed my camera Orthographics Size to 5.4, in order to keep a PPU for every spritesheet to 100 (then a background sprite of 1920*1080 fits perfectly with the camera). But actually i use to change this value ingame when i have to do some special zooms on characters, so adapt the ortographic size can't be the right way to fix the problem.

 

@ColossalPaul one idea came in my mind : when I use the "Sprite Packer", all sprites are reorganized and it seems there are no artifacts anymore with same configuration, so could it be a reliable solution to avoid my problem without modifying each spritesheet one by one on my side ?