Problem with UV map in blender

Hi.
The first top was flying because of incorrectly set up weight transfer
- find a maxis reference of similar shape;
- make sure your garment and the reference are both visible;
- select the reference, shift-select the garment, transfer weights with the following setting (By name is the most important and the most likely reason why the mesh is flying);
- clean with all groups;
- limit total


In the second case the uvs did not transfer
- same as before, reference of similar shape and visible;
- create uv_1;
- select your garment, add Data transfer, choose your reference as Source object, set the rest like in the pic, making sure to enable UVs button (the blue one), apply.

at the stage of merging the naked mesh and the mesh of the target thing, you do something like this on the neck, and this is where everything breaks down for me.

I did everything as described above :((

photo