Error running move_base

edit

what(): Tried to subscribe to a topic with the same name but different md5sum as a topic that was already subscribed [sensor_msgs/LaserScan/90c7ef2dc6895d81024acba2ac42f369 vs. sensor_msgs/PointCloud/d8e9c3f5afbdd8a130fd1d2763945fca]

Error occurs when running move_base.launch

I am using a ZED camera and Ubuntu 18.04 paired with ROS melodic.

<launch>

 <include file="$(find zed_nodelet_example)/launch/zed_laserscan_nodelet.launch">
  <arg name="camera_model" value="zed"/>
 </include>
 <remap from="/scan" to="/zed/scan"/>
 <remap from="/zed/zed_nodelet/odom" to="odom" />

</launch> 

move_base launch file:
<launch>

   <master auto="start"/>
 <!-- Run the map server --> 
    <node name="map_server" pkg="map_server" type="map_server" args="$(find cleaningbot_2dnav)/my_map.pgm"/>

 <!--- Run AMCL --> 
    <include file="$(find amcl)/examples/amcl_omni.launch" />

   <node pkg="move_base" type="move_base" respawn="false" name="move_base" output="screen">
    <rosparam file="$(find cleaningbot_2dnav)/costmap_common_params.yaml" command="load" ns="global_costmap" /> 
    <rosparam file="$(find cleaningbot_2dnav)/costmap_common_params.yaml" command="load" ns="local_costmap" />
    <rosparam file="$(find cleaningbot_2dnav)/local_costmap_params.yaml" command="load" />
    <rosparam file="$(find cleaningbot_2dnav)/global_costmap_params.yaml" command="load" /> 
    <rosparam file="$(find cleaningbot_2dnav)/base_local_planner_params.yaml" command="load" />
 </node>

</launch>