Unable to use generator for punching_bag

[GunjanSolanki]

Getting error : Deprecation warning: Expected boolean default value for '--orm'; got :active_record (string).

On rails g punching_bag.

Here is the full error :

Running via Spring preloader in process 5336
Deprecation warning: Expected string default value for '--controller'; got false (boolean).
This will be rejected in the future unless you explicitly pass the options check_default_type: false or call allow_incompatible_default_type! in your code
You can silence deprecations warning by setting the environment variable THOR_SILENCE_DEPRECATION.
Deprecation warning: Expected boolean default value for '--orm'; got :active_record (string).
This will be rejected in the future unless you explicitly pass the options check_default_type: false or call allow_incompatible_default_type! in your code
You can silence deprecations warning by setting the environment variable THOR_SILENCE_DEPRECATION.
Could not find generator 'punching_bag'.