Error installing `ros-kinetic-gazebo-ros-control`

edit

Hi,

I am trying to install ros-kinetic-gazebo-ros-control package using the command

sudo apt-get install ros-kinetic-gazebo-ros-control

However while doing so I get the error message that I have pasted below. I did sudo apt-get update but the same error persists. Any help in resolving the issue is appreciated.

Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required: 
linux-headers-4.15.0-50 linux-headers-4.15.0-50-generic linux-headers-4.4.0-148 linux-image-4.15.0-50-generic linux-modules-4.15.0-50-generic   
linux-modules-extra-4.15.0-50-generic snapd-login-service Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
ros-kinetic-control-toolbox ros-kinetic-controller-interface ros-kinetic-controller-manager ros-kinetic-controller-manager-msgs
ros-kinetic-hardware-interface ros-kinetic-joint-limits-interface ros-kinetic-realtime-tools ros-kinetic-transmission-interface
The following NEW packages will be installed:
ros-kinetic-control-toolbox ros-kinetic-controller-interface ros-kinetic-controller-manager ros-kinetic-controller-manager-msgs
ros-kinetic-gazebo-ros-control ros-kinetic-hardware-interface ros-kinetic-joint-limits-interface ros-kinetic-realtime-tools
ros-kinetic-transmission-interface
0 upgraded, 9 newly installed, 0 to remove and 21 not upgraded.
Need to get 688 kB of archives.
After this operation, 3,813 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Err:1 http://packages.ros.org/ros/ubuntu xenial/main amd64 ros-kinetic-realtime-tools amd64 1.11.1-0xenial-20190320-130942-0800
404  Not Found [IP: 64.50.236.52 80]
Err:2 http://packages.ros.org/ros/ubuntu xenial/main amd64 ros-kinetic-control-toolbox amd64 1.17.0-0xenial-20190320-143943-0800
404  Not Found [IP: 64.50.236.52 80]
Err:3 http://packages.ros.org/ros/ubuntu xenial/main amd64 ros-kinetic-hardware-interface amd64 0.13.3-0xenial-20190320-132757-0800
404  Not Found [IP: 64.50.236.52 80]
Err:4 http://packages.ros.org/ros/ubuntu xenial/main amd64 ros-kinetic-controller-interface amd64 0.13.3-0xenial-20190320-133652-0800
404  Not Found [IP: 64.50.236.52 80]
Err:5 http://packages.ros.org/ros/ubuntu xenial/main amd64 ros-kinetic-controller-manager-msgs amd64 0.13.3-0xenial-20180824-100448-0800
404  Not Found [IP: 64.50.236.52 80]
Err:6 http://packages.ros.org/ros/ubuntu xenial/main amd64 ros-kinetic-controller-manager amd64 0.13.3-0xenial-20190320-134400-0800
404  Not Found [IP: 64.50.236.52 80]
Err:7 http://packages.ros.org/ros/ubuntu xenial/main amd64 ros-kinetic-joint-limits-interface amd64 0.13.3-0xenial-20190320-141139-0800
404  Not Found [IP: 64.50.236.52 80]
Err:8 http://packages.ros.org/ros/ubuntu xenial/main amd64 ros-kinetic-transmission-interface amd64 0.13.3-0xenial-20190320-133548-0800
404  Not Found [IP: 64.50.236.52 80]
Err:9 http://packages.ros.org/ros/ubuntu xenial/main amd64 ros-kinetic-gazebo-ros-control amd64 2.5.18-1xenial-20190320-175439-0800
404  Not Found [IP: 64.50.236.52 80]
E: Failed to fetch http://packages.ros.org/ros/ubuntu/pool/main/r/ros-kinetic-realtime-tools/ros-kinetic-realtime-tools_1.11.1-0xenial-20190320-130942-0800_amd64.deb  404  Not Found [IP: 64.50.236.52 80]
E: Failed to fetch http://packages.ros.org/ros/ubuntu/pool/main/r/ros-kinetic-control-toolbox/ros-kinetic-control-toolbox_1.17.0-0xenial-20190320-143943-0800_amd64.deb  404  Not Found [IP: 64.50.236.52 80]

E: Failed to fetch http://packages.ros.org/ros/ubuntu/pool/main/r/ros-kinetic-hardware-interface/ros-kinetic-hardware-interface_0.13.3-0xenial-20190320-132757-0800_amd64.deb  404  Not Found [IP: 64.50.236.52 80]

E: Failed to fetch http://packages.ros.org/ros/ubuntu/pool/main/r/ros-kinetic-controller-interface/ros-kinetic-controller-interface_0.13.3-0xenial-20190320-133652-0800_amd64.deb  404  Not Found [IP: 64.50.236.52 80]

E ...