Keywords have been previously used before, how to fix it?

SmartCrawl Pro is showing Keywords have been previously used before is coming up in SmartCrawl but I've double checked and no other page has the same exact keywords.
I did a keyword search and those keywords are not used on any other page/post/custom post on the site.
Please help.
https://cdn.livechat-static.com/api/file/lc/att-old/8801096/e43df837a5cb694061d516b178fa0286.jpg