Hi Kate - we can very rarely be definitive re what in effect is a hypothetical Q as so much relies on the actual specifics involved and the paperwork then submitted.
However in general terms if you have the consent/agreement of the restrictioner then there should be no real issue
Whilst no other titles having the same restriction can be relevant the 'error' could have been on all those titles and a restriction should have been added on those in the same way as it was on yours.
The real point here is that if you have both things you refer to, namely an error and the restrictioner's consent then there's unlikely to be anything else you can get and you have the bases covered when applying.
But we won;t know until the application is submitted and then considered fully. If you are trying to remortgage then I'd suggest lodging the application and then
requesting expedition to keep the wait time to a minimum