Facing issue on implementing parallel execution in testng cucumber project

Facing issue on implementing parallel execution in testng cucumber project

Scenario

Each scenario functionality is assigning random value as part of step this random value is assigned to static parameter when i enabled parallel execution.

all scenario start execution in parallel mode but here the random value generated and same value assigned to all scenarios steps.

I am not able to solve this.for me it entirely blocked for implementing parallel execution.

I teried with junit also same issue i am facing

Could you pls help me on this issue