attempting to create an existing database results in uninitialized constant error #1092

When running the create database task for postgres for an already existing database, I get a ActiveRecord::Tasks::PostgreSQLDatabaseTasks::PG due to activercord expecting a PG::DuplicateDatabase error https://github.com/rails/rails/blob/v5.2.6/activerecord/lib/active_record/tasks/postgresql_database_tasks.rb#L25, while the PG gem is not included with jruby. From the gemfile, it looks like the PG gem is only required for MRI ruby, so this might have slipped through the tests.

activerecord: 5.2.6
activerecord-jdbc-adapter: 52.8