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Changing GFX29 with YY-CHR is causing overworld glitches and levels glitches

I hope im in the correct place here i have a problem when i change the gfx29 with yy-chr to make my own title screen graphics
it glitches the whole overworld and a level where i use mist
here is a screenshot from the overworld glitch the overworld it self is still standard but will change later

I don't know what to do maybe you can help me.
The OW's border also uses graphics, y'know, and you happened to overwrite them. When editing GFX29/2A, make sure to only replace what you won't need - usually the "SUPER MARIO WORLD" letters.
Ok i wasn't thinking about that thanks.
Then i need to change it