On selling settings:

what is the meaning of this.
Validate Selling Price for Item against Purchase Rate or Valuation Rate

my cenario.
its validanting for last purchases rate but not for valuation Rate

you can see the price and the valuation for product 1 is 75 last purchases rate, and 0.13 for valuation rate

but when you make a sell you have this mensage

@Dany_Carvalheiro it will ensure that you dont sell a product with a low price than the valuation rate!

For last purchase rate, your valuation method, should be FIFO