I verified, that you can equip any level required items in SoD regardless of your level. Further testing showed that stats don't work if your not the correct level, but worn effects work, and clickies work if you are at least above the "Click Level Required". I had to do a quick fix to prevent this:
UPDATE items SET clicklevel = reqlevel WHERE clicklevel < reqlevel;
UPDATE items SET clicklevel2 = reqlevel WHERE clicklevel2 < reqlevel;
[SQL] UPDATE items SET clicklevel = reqlevel WHERE clicklevel < reqlevel;
Affected rows: 11842
Time: 0.617ms
[SQL]
UPDATE items SET clicklevel2 = reqlevel WHERE clicklevel2 < reqlevel;
Affected rows: 11716
Time: 0.685ms