Updating the new chocophlan db

Hi
I noticed metaphlan 4 was recently released. We use humann3 while providing a custom taxonomic table (bugs list). Is it possible to simply update the chocophlan database to the mpa_vJan21_CHOCOPhlAnSGB_NEW version, or do we need to also install metaphlan4 ? Any general guidelines or recommendations would be much appreciated.

Cheers

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