Unable to create Runtime field [ conflict at fetch]

I am trying to set up Airflow observability via Statsd and Elastic.
I wanted to create a runtime field. the Scripts checks out well , but when i try to save the runtime fields it shows below error

the Entire config:

I had a quick look at Issues · elastic/kibana · GitHub, but nothing is sticking out. Any chance that there are parallel edits to this data view?