elasticsearch7.exceptions.RequestError: RequestError(400, 'invalid_index_name_exception', "Invalid index name [_watcher], must not start with '_', '-', or '+'")

[yashwatwani]

While running "python run_test.py --test_file monitoring_cluster_health/tests/test1.json"

I am getting this error

Unable to delete current dataset
C:\Users\yashw\AppData\Local\Continuum\anaconda3\envs\elkex\lib\site-packages\elasticsearch7\connection\base.py:193: ElasticsearchDeprecationWarning: [types removal] Specifying types in document index requests is deprecated, use the typeless endpoints instead (/{index}/_doc/{id}, /{index}/_doc, or /{index}/_create/{id}).
warnings.warn(message, category=ElasticsearchDeprecationWarning)
Traceback (most recent call last):
File "run_test.py", line 61, in
es.watcher.put_watch(id=test["watch_name"],body=watch)
File "C:\Users\yashw\AppData\Local\Continuum\anaconda3\envs\elkex\lib\site-packages\elasticsearch7\client\utils.py", line 152, in _wrapped
return func(*args, params=params, headers=headers, **kwargs)
File "C:\Users\yashw\AppData\Local\Continuum\anaconda3\envs\elkex\lib\site-packages\elasticsearch7\client\watcher.py", line 160, in put_watch
body=body,
File "C:\Users\yashw\AppData\Local\Continuum\anaconda3\envs\elkex\lib\site-packages\elasticsearch7\transport.py", line 392, in perform_request
raise e
File "C:\Users\yashw\AppData\Local\Continuum\anaconda3\envs\elkex\lib\site-packages\elasticsearch7\transport.py", line 365, in perform_request
timeout=timeout,
File "C:\Users\yashw\AppData\Local\Continuum\anaconda3\envs\elkex\lib\site-packages\elasticsearch7\connection\http_urllib3.py", line 269, in perform_request
self._raise_error(response.status, raw_data)
File "C:\Users\yashw\AppData\Local\Continuum\anaconda3\envs\elkex\lib\site-packages\elasticsearch7\connection\base.py", line 316, in _raise_error
status_code, error_message, additional_info
elasticsearch7.exceptions.RequestError: RequestError(400, 'invalid_index_name_exception', "Invalid index name [watcher], must not start with '', '-', or '+'")