I have relatively new, one year old Yanchi Glueless Locking Strand Woven Bamboo Floors. Awesome wooden floors! However, I screwed up and left a blue colored box on the floor. You guessed it, my dachshund/dog came along to urinate/mark the box. I went to move the box the next day, found the stain, tried to clean/get it out, but no luck. I now have a 2" x 5" light purple dye stain in the middle of a plank.

Any advise would be greatly appreciated!

You can try Oxalic acid, a wood bleach, but with a sealed surface it may not penetrate. You could also try regular bleach but I would do this with an ear swab just to be careful. Do you have any left over planks?