The problem with installing the plugin

[AndrewBLR]

My Redmine data:

Environment:
  Redmine version                5.0.5.stable.22274
  Ruby version                   3.0.2-p107 (2021-07-07) [x86_64-linux-gnu]
  Rails version                  6.1.7.4
  Environment                    production
  Database adapter               Mysql2
  Mailer queue                   ActiveJob::QueueAdapters::AsyncAdapter
  Mailer delivery                smtp
Redmine settings:
  Redmine theme                  Purplemine2-master
SCM:
  Subversion                     1.14.1
  Git                            2.34.1
  Filesystem                     
Redmine plugins:
  mega_calendar                  1.9.3
  redmine_agile                  1.6.5
  redmine_checklists             3.1.22
  redmine_contacts               4.3.7
  redmine_hide_sidebar           4.0.0
  redmine_people                 1.6.3
  redmine_theme_changer          0.6.0
  redmine_wktime                 4.7
  redmine_work_time              0.4.1

After executing - "bundle install" I get the following error:

bundle install
Your Gemfile lists the gem redmine_crm (>= 0) more than once.
You should probably keep only one of them.
Remove any duplicate entries and specify the gem only once.
While it's not a problem now, it could cause errors if you change the version of one of them later.
Your Gemfile lists the gem vcard (>= 0) more than once.
You should probably keep only one of them.
Remove any duplicate entries and specify the gem only once.
While it's not a problem now, it could cause errors if you change the version of one of them later.
Fetching https://github.com/moiristo/deep_cloneable.git
Fetching gem metadata from https://rubygems.org/.........
Resolving dependencies...
Could not find compatible versions

Because every version of deep_cloneable depends on activerecord >= 3.1.0, < 6
  and rails >= 6.1.7.4, < 7.0.0.alpha1 depends on activerecord = 6.1.7.4,
  every version of deep_cloneable is incompatible with rails >= 6.1.7.4, < 7.0.0.alpha1.
So, because Gemfile depends on rails = 6.1.7.4
  and Gemfile depends on deep_cloneable >= 0,
  version solving has failed.

Please help to solve the problem