What if my fabric says "do not pre wash"?

Hi! I bought a few fabric quarters from Joanns and the sticker says "do not pre wash," but it has washing instructions. Do I still pre wash it in this situation?

Honestly, I wouldn't worry about it as long as you plan to put the finished embroidery in a hoop! Just make sure to rinse the embroidery under cold water to ensure no color-runnage. :)