Flowering stage nutrition values,

Hello dear Cannabis enthusiasts!

Here i would like to ask you about the flowering fertilization, and specifically about Potassium. There is a brand called Metrop and as you can see on the image the MR2 product is 10-20-40.

Normally the nutrition ratios in flowering is about 1-3-2 by the literature, and by the past experiences i had. But now i should advice a CBD grower company as a horticulturist with the fertilization process to make a cost cut. I've no expreience with the Metrop product family, to be honest none of the canna brands, mostly mixed my sollutions on my own. This is the first time i see such a huge amount of Potassium, well it's not the only product needed, but still adding the other's the Potassium is still higher than Phosphorus.

Is there any reason to give more Potassium for Cannabis than Phosphorus? What do you think about?

Please advice :)