Just as a note, you can set the yellow part of the texture to be clear, and then set the underlying part geometry to be yellow, and the problem should go away. Antialiasing around the printed bits can get complicated, though.
Note that this is NOT the same thing as trying to set the yellow part of the sticker to be transparent. You'd be setting the yellow part of the texture to be yellow, but since the texture would then be applied over yellow geometry, the sticker itself would still be yellow for that section.
Note that this is NOT the same thing as trying to set the yellow part of the sticker to be transparent. You'd be setting the yellow part of the texture to be yellow, but since the texture would then be applied over yellow geometry, the sticker itself would still be yellow for that section.