localでのDBがherokuの方に反映されません

現在手元にあるWEBアプリをデプロイしてheroku場で動かそうとしているのですが、ローカルのDBが反映されていません。
やったことは
git add *
git commit -m "text"
git push -f heroku master
heroku run rake db:migrate
heroku run rake db:seed
heroku open

ちなみにheroku run rake db:seedをするとこのようなめえセージが出るのですが、これが何か関係あるのでしょうか？

ActiveRecord::RecordInvalid: Validation failed: Email has already been taken
/app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/validations.rb:78:in `raise_validation_error'
/app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/validations.rb:50:in `save!'
/app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/attribute_methods/dirty.rb:43:in `save!'
/app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/transactions.rb:313:in `block in save!'
/app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/transactions.rb:384:in `block in with_transaction_returning_status'
/app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/connection_adapters/abstract/database_statements.rb:235:in `block in transaction'
/app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/connection_adapters/abstract/transaction.rb:194:in `block in within_new_transaction'
/app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/connection_adapters/abstract/transaction.rb:191:in `within_new_transaction'
/app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/connection_adapters/abstract/database_statements.rb:235:in `transaction'
/app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/transactions.rb:210:in `transaction'
/app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/transactions.rb:381:in `with_transaction_returning_status'
/app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/transactions.rb:313:in `save!'
/app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/suppressor.rb:46:in `save!'
/app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/persistence.rb:51:in `create!'
/app/db/seeds.rb:5:in `<top (required)>'
/app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/dependencies.rb:286:in `load'
/app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/dependencies.rb:286:in `block in load'
/app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/dependencies.rb:258:in `load_dependency'
/app/vendor/bundle/ruby/2.3.0/gems/activesupport-5.1.4/lib/active_support/dependencies.rb:286:in `load'
/app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/engine.rb:549:in `load_seed'
/app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/tasks/database_tasks.rb:270:in `load_seed'
/app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/railties/databases.rake:184:in `block (2 levels) in <top (required)>'
/app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/commands/rake/rake_command.rb:21:in `block in perform'
/app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/commands/rake/rake_command.rb:18:in `perform'
/app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/command.rb:46:in `invoke'
/app/vendor/bundle/ruby/2.3.0/gems/railties-5.1.4/lib/rails/commands.rb:16:in `<top (required)>'
/app/bin/rails:9:in `require'
/app/bin/rails:9:in `<main>'
Tasks: TOP => db:seed