How to trigger numerous Jenkins jobs in parallel avoiding those receiving same job ID?

Question

I got main job that receives items list, I need to trigger another job for each item passing the item as parameter. The job that triggered for each Item is the same job for all. For main job I use Jenkins file as followed

def run_items=[:]
for (item in items_list){
        run_items[item]={
         build wait: true,job: 'items_job', parameters: [
         string(name: 'Item', value: item)
    ]
}
parallel run_items

The logic for the main job is working the problem is that all parallel triggered item instances triggering same single instance of items job. It happening because of how build command works, it getting the next job id first, since I gout numerous parallel commands those receive the same next build number. How can it be solved?