Error: already publishing

[Dattatray Hinge]

Hi

I am getting below error with 4G cameras streaming on rtmp
2023/09/28 14:48:46 [error] 13#13: *849 live: already publishing, client: xx.xx.xx.xx, server: 0.0.0.0:1935

Note: There are about twenty 4G cameras streaming to this rtmp server at the same time, I am not sure if this is due to the 4G network or something wrong in my nginx config. I am using the latest tiangolo/nginx-rtmp image

My docker file

FROM tiangolo/nginx-rtmp

COPY nginx.conf /etc/nginx/nginx.conf

My Nginx File

user www-data;
worker_processes auto;
rtmp_auto_push on;
pid /run/nginx.pid;
include /etc/nginx/modules-enabled/*.conf;

events {
    worker_connections 4096;
    accept_mutex on;
}

rtmp {
    log_format new '[$time_local-$remote_addr]: $command:$app:$name, Args=$args, Recv=$bytes_received, Sent=$bytes_sent, url=$pageurl, flashver=$flashver,  session_readable_time=$session_readable_time, Connection=$connection';

    server {
        listen 1935;
        listen [::]:1935 ipv6only=on;
        chunk_size 4096;

        timeout 60s;
        ping 3m;
        ping_timeout 30s;

        access_log /var/log/nginx/rtmp_access.log new;
	access_log /var/log/nginx/rtmp_access.log;

        # HLS
        hls on;
        hls_path /tmp/hls;
        hls_fragment 10s; # default is 5s
        hls_playlist_length 10m; # default is 30s
        # once playlist length is reached it deletes the oldest fragments
        # hls_continuous on;

        application live {
            live on;
            record off;

            # wait_key on;
            # wait_video on;

            # drop_idle_publisher 15s;
            # idle_streams off;  

            # Auth 
            on_publish http://myserver.com/api/v1/auth;
        }
    }
}

Any help will be greatly appreciated :)