I'd like to have a text box and line linked together, so that when I move the line with

I've done this with Text > Put on Path and everything works great. But when I try to copy/duplicate/clone either the Put on Path functionality does't transfer across or, the text box is still linked to the original line - does anyone know how to resolve this?
(Probably not relevant but - added [;baseline-shift:1.33px] to text style with XML editor so text and line aren't touching).
Grateful for any help