Well correlation studiear say 37% risk, but I recognize that correlation is not causation, however they have found the mechanism that causes the increased psychosis with genes.

https://www.mdpi.com/2076-3417/12/20/10464

AKT1 gene polymorphism rs2494732 as the main genetic factor

C allele homozygosity significantly increases psychosis risk in cannabis users.

Mechanism: Cannabis consumption slows AKT1 functionality, releasing greater dopamine in the striatum through indirect mechanisms.

COMT and DAT1 gene interactions compound the risk

CB-1 receptor activation leading to increased dopamine release and GABA inhibition