NO one likes being mistaken for someone else — especially if that someone else has been their sworn rival for more than a century.

    So when Guns N’ Roses’ announcer yelled “Sydney” just before they walked on stage in Melbourne, the band was met with a chorus of boos.

    And to make matters worse, the veteran rockers weren’t even on time.

    Luckily, it seems they made up for it with a rousing concert — and a swiftly issued apology on social media.

    “Melbourne!” the band — which had just completed two nights in Sydney — posted on Twitter.

    “Accidentally after 30 years McBob made an error, we’re truly sorry. Thank you for coming out tonight!”

    Luckily, guitar technician McBob, who has been introducing the group on stages around the world during their “Not in This Lifetime” tour, was quickly forgiven by fans for his momentary slip up.

    One follower replied to the post with: “One mistake every 30 years ... Reasonable.”

    Sydney and Melbourne, Australia’s two largest cities, have had a long-running rivalry dating back to gripes over trade during colonial times.

    (SD-Agencies)