Warning [parser.cc:950]

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I'm trying to launch turtlebot3_autorace_2020. launch, I receive the following error

Warning [parser.cc:950] XML Element[static], child of element[model] not defined in SDF. Ignoring[static]. You may have an incorrect SDF file, or an sdformat version that doesn't support this element.
setting /run_id to dbf995f2-1945-11ec-92c3-e82a44ef4c23
process[rosout-1]: started with pid [18916]
started core service [/rosout]
process[gazebo-2]: started with pid [18922]
process[gazebo_gui-3]: started with pid [18928]
process[spawn_urdf-4]: started with pid [18933]
[ INFO] [1632054839.838982274]: Finished loading Gazebo ROS API Plugin.
[ INFO] [1632054839.841495436]: waitForService: Service [/gazebo/set_physics_properties] has not been advertised, waiting...
[ INFO] [1632054839.920049045]: Finished loading Gazebo ROS API Plugin.
[ INFO] [1632054839.922494585]: waitForService: Service [/gazebo_gui/set_physics_properties] has not been advertised, waiting...
Warning [parser.cc:950] XML Element[static], child of element[model] not defined in SDF. Ignoring[static]. You may have an incorrect SDF file, or an sdformat version that doesn't support this element.
[ INFO] [1632054840.759963718]: waitForService: Service [/gazebo/set_physics_properties] is now available.
[ INFO] [1632054840.813050863, 116.366000000]: Physics dynamic reconfigure ready.
[ INFO] [1632054841.441527915, 116.538000000]: Camera Plugin: Using the 'robotNamespace' param: '/'
[ INFO] [1632054841.446392189, 116.538000000]: Camera Plugin (ns = /)  <tf_prefix_>, set to ""
[ INFO] [1632054841.657225993, 116.538000000]: Laser Plugin: Using the 'robotNamespace' param: '/'
[ INFO] [1632054841.657354329, 116.538000000]: Starting Laser Plugin (ns = /)
[ INFO] [1632054841.662250720, 116.538000000]: Laser Plugin (ns = /)  <tf_prefix_>, set to ""
[ INFO] [1632054841.769038114, 116.538000000]: Starting plugin DiffDrive(ns = //)
[ INFO] [1632054841.769217365, 116.538000000]: DiffDrive(ns = //): <rosDebugLevel> = na
[ INFO] [1632054841.770176263, 116.538000000]: DiffDrive(ns = //): <tf_prefix> = 
[ INFO] [1632054841.771488989, 116.538000000]: DiffDrive(ns = //): Advertise joint_states
[ INFO] [1632054841.772392109, 116.538000000]: DiffDrive(ns = //): Try to subscribe to cmd_vel
[ INFO] [1632054841.775561234, 116.538000000]: DiffDrive(ns = //): Subscribe to cmd_vel
[ INFO] [1632054841.776480601, 116.538000000]: DiffDrive(ns = //): Advertise odom on odom 
[ INFO] [1632054841.791093719, 116.539000000]: imu plugin missing <frameName>, defaults to <bodyName>
[spawn_urdf-4] process has finished cleanly
log file: /home/kannan/.ros/log/dbf995f2-1945-11ec-92c3-e82a44ef4c23/spawn_urdf-4*.log