rover_circuit1.launch is being used to spawn second instance; Rover

rover_circuit1.launch

<!-- -->
<launch>

  <arg name="simRate" default="nan"/>
  <param name="use_sim_time" type="bool" value="true" />
  <include file="$(find mavros)/launch/apm_sitl_rover.launch"></include>

  <arg name="enable_logging" default="true"/>
  <arg name="enable_ground_truth" default="true"/>
  <arg name="log_file" default="rover"/>
  <arg name="headless" default="false"/>
  <arg name="gui" default="true"/>
  <arg name="world_name" default="$(find ardupilot_sitl_gazebo_plugin)/worlds/rover_circuit/rover_circuit1.world"/>
  <env name="GAZEBO_MODEL_PATH" value="$(find drcsim_model_resources)/gazebo_models/environments:$(find ardupilot_sitl_gazebo_plugin)/meshes/meshes_sensors:$(find ardupilot_sitl_gazebo_plugin)/meshes/meshes_outdoor:$(find ardupilot_sitl_gazebo_plugin)/meshes/meshes_warehouse"/>
  <arg name="name" default="rover"/>
  <arg name="model" default="$(find ardupilot_sitl_gazebo_plugin)/urdf/rover.urdf"/>
  <arg name="tf_prefix" default="$(optenv ROS_NAMESPACE)"/>
  <arg name="debug" default="true"/>
  <arg name="verbose" default="true"/>

  <param name="robot_description" command="
    $(find xacro)/xacro.py '$(arg model)'
    enable_logging:=$(arg enable_logging)
    enable_ground_truth:=$(arg enable_ground_truth)
    log_file:=$(arg log_file)"
  />
  <param name="tf_prefix" type="string" value="$(arg tf_prefix)" />

  <node name="spawn_rover" pkg="gazebo_ros" type="spawn_model" args="-param robot_description -urdf -model $(arg name)" respawn="false" output="screen"></node>
      
</launch>