Linux Ruby gem error when i want install something

Question

When i want install something through 'gem install' i got error.

I always use sudo, i have installed Ruby 2.6.3.

i got error like this

uilding native extensions. This could take a while...
ERROR:  Error installing ruby-debug-ide:
ERROR: Failed to build gem native extension.

current directory: /var/lib/gems/2.5.0/gems/ruby-debug-ide-0.6.1/ext
/usr/bin/ruby2.5 mkrf_conf.rb
Installing base gem
Building native extensions. This could take a while...

current directory: /var/lib/gems/2.5.0/gems/ruby-debug-ide-0.6.1/ext
/usr/bin/ruby2.5 -rrubygems /usr/share/rubygems-integration/all/gems/rake-12.3.1/exe/rake RUBYARCHDIR=/var/lib/gems/2.5.0/extensions/x86_64-linux/2.5.0/ruby-debug-ide-0.6.1 RUBYLIBDIR=/var/lib/gems/2.5.0/extensions/x86_64-linux/2.5.0/ruby-debug-ide-0.6.1
/usr/bin/ruby2.5: No such file or directory -- /usr/share/rubygems-integration/all/gems/rake-12.3.1/exe/rake (LoadError)

rake failed, exit code 1

Gem files will remain installed in /var/lib/gems/2.5.0/gems/ruby-debug-ide-0.6.1 for inspection.
Results logged to /var/lib/gems/2.5.0/extensions/x86_64-linux/2.5.0/ruby-debug-ide-0.6.1/gem_make.out