Database auto-linking filter
From Carleton Moodle Docs
Database auto-linking is a site Filter that will create links to a database entry where the name/title (word or phrase) of the database entry is used within the same course in which the database is located. This includes forum postings, pages, labels etc.
Disabling this filter
If you do not want the filter to be applied you can disable at either for a specific activity or for the whole course. To disable for a specific activity, open the activity and then click on the Filters link in the Administration block under Activity Administration. To disable for the entire course page, start from the main course page and then click on Filters in the Administration block under Course Administration.