Prolost Dehaze requires Lightroom 6.2 or later, but I have Lightroom 6.14.
You have Lightroom six-dot-fourteen, not six-dot-one-dot-four. 14 comes after 2, so you're good!
You have Lightroom six-dot-fourteen, not six-dot-one-dot-four. 14 comes after 2, so you're good!