You could try the Convert Tag -> Tag.
There you have a preview (green rectangle) to be sure what exactly will be copied.

What exactly do you see if you try it this way?
Can you please show us a screen shot?
You could try the Convert Tag -> Tag.
There you have a preview (green rectangle) to be sure what exactly will be copied.

What exactly do you see if you try it this way?
Can you please show us a screen shot?