wrong archive

Good morning
I’ve just migrated my site from joomla to wordpress.
Everything ok, apart from the Archives section, where the articles are grouped by month (for example “February 2021”) as I want … but in that list of months there’s also a link (which appears to me as “October 13”, as if it were a specific day) that collects in bulk many articles from different months and years.
Those posts, in any case, are also correctly listed in the months of belonging.
Question: How can I delete that fake month from the archive list?
I also searched with phpMyAdmin but I can’t find anything

• This topic was modified 5 years, 4 months ago by Steven Stern (sterndata).