No sound in stream

I used ffmpeg for live stream like below,

ffmpeg -re -thread_queue_size 5512 -i "file.mp4" -i "file.mp3" -c:v copy -c:a copy -f flv rtmp://.

Here I don't have audio in video. Then I tried,

ffmpeg -re -thread_queue_size 5512 -i "file.mp4" -map 0 -map -0:a -i "file.mp3" -c:v copy -c:a copy -f flv rtmp://to remove audio from video, then I get error like,

Option map (set input stream mapping) cannot be applied to input url file.mp3

How to fix it?

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