Fixed SQL error when searching same word as filter

Device: PC
Browser: Brave Version 1.32.106 Chromium: 96.0.4664.45
OS: Windows 10

Steps to reproduce:
1) Go to search.php
2) Pick an advanced filter item type
3) In the keywords input, write the name of the picked filter
4) SQL error

For example:
Pick "Gloves" advanced filter, search for "gloves" -> Unknown column 'Gloves' in 'where clause' Pick "Katars" advanced filter, search for "katars" -> Unknown column 'Katars' in 'where clause'

Anything else to add:
Haven't tested every single filter, but there is no bug with filters like "Faster hit recovery", "Grand charm"

Cheers.