Warning about live copies when opening WDP

I'm working on a site for a client that had 2 variants - main and mobile - all good.
Yesterday I added a Tablet size variant - when opening WDP this morning I get the attached warning - Is this going to cause problems when I publish the site?
Many thanks,
LGF
Attachment 119219

Edit: sorry - that should be live shares - not copies!

As you can scale Live Shares, it is possible that they are a different size and in the wrong place.
A fairly quick check and correction should suffice.

Acorn