I neither know nor care what this or any other scripture says or means, but to the JW there is no God but Jehovah and His word is inspired and true. That is where the word ‘true’ has the meaning ‘what The Watchtower has most recently written’ and ‘inspired’ has the meaning ‘whatever suits the Faithful and Discreet Slave, which is the Governing Body’.
Or, ‘the bible means what the Writing Department most recently said it means to meet the Governing Body’s current need’. Which makes 'Governing Body' a synonym for 'Jehovah', therefore what is in The Watchtower is His word and is true per se, including as it changes from time-to-time.
Thus this scripture is correctly explained.
In the end I think this leads to many (most?) XJWs just giving up caring what the bible says and being unable to abide the idea of a God: they heard Him speak at conventions and didn't like Him.
JW logic. JW reality.