Encoding::CompatibilityError

Есть один проект: руби 2.0.0-p247, rails 3.2.13. Ubuntu 20, база postgres 9.6. При попытке сохранения в базу или любого пост запроса в этом приложении происходит ошибка:

Encoding::CompatibilityError: inspected result must be ASCII only or use the same encoding with default external

    2.0.0-p247 :003 > np.save
    (0.4ms)  BEGIN
    (0.4ms)  ROLLBACK
    Encoding::CompatibilityError: inspected result must be ASCII only or use the same encoding with default external
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activesupport-3.2.13/lib/active_support/callbacks.rb:190:in `inspect'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activesupport-3.2.13/lib/active_support/callbacks.rb:190:in `inspect'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activesupport-3.2.13/lib/active_support/callbacks.rb:190:in `start'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activesupport-3.2.13/lib/active_support/callbacks.rb:352:in `block in compile'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activesupport-3.2.13/lib/active_support/callbacks.rb:351:in `each'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activesupport-3.2.13/lib/active_support/callbacks.rb:351:in `compile'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activesupport-3.2.13/lib/active_support/callbacks.rb:399:in `__run_callback'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activesupport-3.2.13/lib/active_support/callbacks.rb:385:in `_run_validate_callbacks'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activesupport-3.2.13/lib/active_support/callbacks.rb:81:in `run_callbacks'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activemodel-3.2.13/lib/active_model/validations.rb:228:in `run_validations!'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activemodel-3.2.13/lib/active_model/validations/callbacks.rb:53:in `block in run_validations!'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activesupport-3.2.13/lib/active_support/callbacks.rb:403:in `_run__4493385434262952102__validation__4293934216052127850__callbacks'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activesupport-3.2.13/lib/active_support/callbacks.rb:405:in `__run_callback'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activesupport-3.2.13/lib/active_support/callbacks.rb:385:in `_run_validation_callbacks'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activesupport-3.2.13/lib/active_support/callbacks.rb:81:in `run_callbacks'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activemodel-3.2.13/lib/active_model/validations/callbacks.rb:53:in `run_validations!'
... 3 levels...
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activerecord-3.2.13/lib/active_record/validations.rb:50:in `save'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activerecord-3.2.13/lib/active_record/attribute_methods/dirty.rb:22:in `save'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activerecord-3.2.13/lib/active_record/transactions.rb:259:in `block (2 levels) in save'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activerecord-3.2.13/lib/active_record/transactions.rb:313:in `block in with_transaction_returning_status'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/database_statements.rb:192:in `transaction'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activerecord-3.2.13/lib/active_record/transactions.rb:208:in `transaction'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activerecord-3.2.13/lib/active_record/transactions.rb:311:in `with_transaction_returning_status'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activerecord-3.2.13/lib/active_record/transactions.rb:259:in `block in save'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activerecord-3.2.13/lib/active_record/transactions.rb:270:in `rollback_active_record_state!'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/activerecord-3.2.13/lib/active_record/transactions.rb:258:in `save'
    from (irb):3
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/railties-3.2.13/lib/rails/commands/console.rb:47:in `start'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/railties-3.2.13/lib/rails/commands/console.rb:8:in `start'
    from /home/carex-ubuntu-user-zero/.rvm/gems/ruby-2.0.0-p247@parts-script-new-admin/gems/railties-3.2.13/lib/rails/commands.rb:41:in `<top (required)>'
    from script/rails:6:in `require'
    from script/rails:6:in `<main>'2.0.0-p247 :004 > 

В других проектах, с более новой версией рубей, такой проблемы нет. Помогите пожалуйста.