Will be problem with vertex paint?????

You must have not made the reference visible before transferring the weights

All of it should be done in 2.76-2.79 versions of Blender, not 2.7, you do not need it

- clone yfBottom_SkirtSkater, append it in the scene, do not hide it;
- switch to Object mode, delete all vertex groups, select the reference, shift-select the skirt, switch to Weight transfer, click on Transfer weights and set up it like in the pic, then Clean tool, then Limit total;

- select the skirt, add Data transfer, choose the reference as source object, set the rest like in the pic, apply. Select the uv_1 map of the reference, study it, then select your and make sure it looks similar( and not what it looks right now);

- add Data transfer again and set it like this to transfer vertex paint. You can paint it manually but they match perfectly, so there's no need;

- select the duplicated bottom, in edit mode delete parts of it covered by the skirt, join it with the skirt;
- assign cut number, delete the reference, import in the yfBottom_SkirtSkater.