ERROR when "install the dependencies missing (ardrone_autonomy) package"

[RainySun-GT]

[with Ubuntu18.04+ros melodic+gazebo9 ]

When I give the command "rosdep install --from-paths src --ignore-src -r -y" in the root of the repository, it reports as follows:

ERROR: the following packages/stacks could not have their rosdep keys resolved
to system dependencies:
qlab_description: Cannot locate rosdep definition for [ardrone-autonomy]
deep_reinforced_landing: Cannot locate rosdep definition for [ardrone_autonomy]
cvg_sim_gazebo_plugins: Cannot locate rosdep definition for [gazebo_plugin]
Continuing to install resolvable dependencies...
#All required rosdeps installed successfully

Is it normal? How can I fix it?