Mission planner not letting me delete waypoint [SOLVED]

Ground Control Software Mission Planner
1

After import list of waypoint as KML file, i cant manage to delete these red waypoint appears on the screen, right click and the DELETE WP option being white out. Even exit Mission Planner and when i came back it still there. What can i do now?

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Persistent waypoint [SOLVED] - Ground Control Software / Mission Planner - ArduPilot Discourse. This link helps