Error in Unit 2 URDF for Gazebo

on step 1.4 trying it spawn simulation. I copied and pasted the 2 launch files and ran the command. Get the following error.

SpawnModel script started
[INFO] [1587746520.467253, 0.000000]: Loading model XML from ros parameter
[INFO] [1587746520.469394, 0.000000]: Waiting for service /gazebo/spawn_urdf_model
[INFO] [1587746520.470784, 0.000000]: Calling service /gazebo/spawn_urdf_model
[INFO] [1587746520.475266, 0.000000]: Spawn status: SpawnModel: Failure - entity already exists.
[urdf_spawner-1] process has finished cleanly
log file: /home/user/.ros/log/6598d142-863f-11ea-9932-02ce03dfcc49/urdf_spawner-1*.log
all processes on machine have died, roslaunch will exit
shutting down processing monitor…
… shutting down processing monitor complete

Hi @jon.nowick2
Try changing the name of the robot you want to spawn. Like the Error says, it already exists.