Thank you for your answer.
Yes reports are important for me as I make Epubs with lots of notes.
Report is an easy way to check if all links are Ok.
I have now created a new Saved research :
Find : <p class="note" id="ftn(.*?)"><a class="noteSymbol"
Replace : <p class="note"><a id="ftn\1" class="noteSymbol"
Thank you