Once data is collected by Insights, it cannot be edited or deleted. This is a purposeful design decision that optimizes Insights' speed and performance.
Insights data is meant for short-term analysis and it will eventually expire from Insights after your retention period. To learn more about data retention, see Insights data retention.
If you have used Insights to track unwanted data or sensitive data and must have it removed, contact your account representative at New Relic, or get support at support.newrelic.com.