RSS Feed/News Update phrase by code

[ENXF NET]

How can I update any phrase by code?

I tried directly, I can see the phrase updated in database, but not in template. How to do it correctly?

Code:

$phrase = \XF::finder('XF:Phrase')->where('title', '=', 'xxxxxxxx')->fetchOne();

if ($phrase) {
    $phrase->phrase_text = 'my phrase';
    $phrase->save();
}

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