ROS Manipulation Unit 6 - spawning table does not work

The following command:
rosrun gazebo_ros spawn_model -database table -gazebo -model table -x 1.30 -y 0 -z 0

does not work. it yields the following error:
spawn_model: error: argument -gazebo_namespace: expected one argument

The command is directly copied from the instruction notebook of unit 6. how can i solve this issue?

Hello @lior ,

Please use these commands instead:

rosrun gazebo_ros spawn_model -database table -model table -sdf -x 1.30 -y 0 -z 0
rosrun gazebo_ros spawn_model -database demo_cube -model grasp_cube -sdf -x 0.65 -y 0.15 -z 1.07