Ruby on Rails: Postgres Relation 'lists' does not exist

I'm getting a weird error. I had sqlite3 working and now switching over to postgres, i'm getting this error.

I have migrations, and I had to add a new column.

create_ideas migration

class CreateIdeas < ActiveRecord::Migration
  def change
    create_table :ideas do |t|
      t.string :name
      t.text :description
      t.string :picture

      t.timestamps
    end
    add_foreign_key :ideas, :lists
  end
end

add_list_id_column_to_ideas migration

class AddListIdColumnToIdeas < ActiveRecord::Migration
  def change
    add_column :ideas, :list_id, :integer

  end
end

What is wrong with my foreign key? I get the error when I do rake db:migrate

I have another migration with foreign key, and no errors yet? Maybe its catching the first error first before seeing the other one, but I have this one too:

create_comments migration

class CreateComments < ActiveRecord::Migration
  def change
    create_table :comments do |t|
      t.string :user_name
      t.text :body
      t.integer :idea_id

      t.timestamps
    end
    add_foreign_key :comments, :ideas
  end
end

last migration I have create_lists

class CreateLists < ActiveRecord::Migration
  def change
    create_table :lists do |t|
      t.string :name
      t.text :description
      t.string :picture

      t.timestamps
    end
  end
end

Any clue why I'm getting errors?

Thanks

edit

my relationships

comments model

belongs_to :idea

idea model

belongs_to :list
has_many :comments

list model

has_many :ideas