Frame issue in Multi robot simulation about rosbot_ros HOT 1 CLOSED

<launch>
    <!-- BEGIN ROBOT 1-->
    <group ns="rosbot1">
        <include file="$(find rosbot_description)/launch/single_rosbot.launch" >
            <arg name="init_pose" value="-x -10 -y -10 -z 0 -R 0 -P 0 -Y 0" />
            <arg name="tf_prefix" value="rosbot1"/>
        </include>
    </group>

    <!-- BEGIN ROBOT 2-->
    <group ns="rosbot2">
        <include file="$(find rosbot_description)/launch/single_rosbot.launch" >
            <arg name="init_pose" value="-x -10 -y 0 -z 0 -R 0 -P 0 -Y 0" />
            <arg name="tf_prefix" value="rosbot2"/>
        </include>
    </group>

    <!-- BEGIN ROBOT 2-->
    <group ns="rosbot3">
        <include file="$(find rosbot_description)/launch/single_rosbot.launch" >
            <arg name="init_pose" value="-x 0 -y -10 -z 0 -R 0 -P 0 -Y 0" />
            <arg name="tf_prefix" value="rosbot3"/>
        </include>
    </group>

</launch>

<launch>
    <arg name="tf_prefix"/>
    <arg name="init_pose"/>

    <!-- Load the joint space controller -->
    <rosparam command="load" file="$(find joint_state_controller)/joint_state_controller.yaml" />
    <node name="joint_state_controller_spawner" pkg="controller_manager" type="spawner" output="screen" args="joint_state_controller" />

    <!-- load the model of the robot" -->
    <param name="robot_description" command="$(find xacro)/xacro '$(find rosbot_description)/urdf/rosbot.xacro' robot_namespace:=$(arg tf_prefix)"/>

    <!-- Spawn the robot_state_publisher with the desired tf_prefix -->
    <node name="robot_state_publisher" pkg="robot_state_publisher" type="robot_state_publisher" output="screen">
        <param name="tf_prefix" value="$(arg tf_prefix)"/>
    </node>

    <!-- Spawn the robot in the desired pose given by "init_pose" variable" -->
    <node name="rosbot_spawn" pkg="gazebo_ros" type="spawn_model" output="screen" args="$(arg init_pose) -urdf -param robot_description -model $(arg tf_prefix)"/>
    
    <node pkg="tf" type="static_transform_publisher" name="maplink" args="0 0 0 0 0 0 map $(arg tf_prefix)/map 100"/>
</launch>