How do launch experiments in DVC?

I want to launch some experiments in DVC. But when I set values of experiment parameters, DVC deletes file 'params.yaml', and experiment doesn't set in queue.

Simplified code for example: Python file 'test.py':

import numpy as np
import json
import yaml

params = yaml.safe_load(open('params.yaml'))["test"]

precision = np.random.random()
recall = params['value']
accuracy = np.random.random()
 

rows = {'precision': precision,
        'recall': recall,
        'accuracy': accuracy}


with open(params['metrics_path'], 'w') as outfile:
    json.dump(rows, outfile)

fpr = 10*np.random.random((1,10)).tolist()
tpr = 10*np.random.random((1,10)).tolist()

with open('plot.json', 'w') as outfile2:
    json.dump(
      {
        "roc": [ {"fpr": f, "tpr": t} for f, t in zip(fpr, tpr) ]
      }, 
      outfile2
      )

params.yaml:

test:
  metrics_path: "scores.json"
  value: 1

dvc.yaml:

stages:
  test:
    cmd: python test.py
    deps:
    - test.py
    params:
    - test.metrics_path
    - test.value
    metrics:
    - scores.json:
        cache: false
    plots:
    - plot.json:
        cache: false
        x: fpr
        y: tpr

It is strange behavior. Is it possible to fix it?