While default LiveKit's value is error if nothing is provided, warn is a
better value for this option, because it allows seeing issues that
otherwise might happen and be invisible, such as:
WARN openvidu.transport.pion.pc webrtc/peerconnection.go:1280 RTPReceiver Receive failed: WebRtcTransport.Produce(): ssrc already exists in RTP listener [ssrc:3696700572] [method:transport.produce] {..., "transport": "PUBLISHER"}
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