Compare line 60 to the error on line 80.

gistfile1.txt

% heroku run rake db:migrate
Running `rake db:migrate` attached to terminal... up, run.3374
DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out and bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/1/4/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /app/Rakefile:7)
DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out and bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/1/4/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /app/Rakefile:7)
Connecting to database specified by DATABASE_URL
Migrating to DeviseCreateUsers (20130409185343)
==  DeviseCreateUsers: migrating ==============================================
-- create_table(:users)
NOTICE:  CREATE TABLE will create implicit sequence "users_id_seq" for serial column "users.id"
NOTICE:  CREATE TABLE / PRIMARY KEY will create implicit index "users_pkey" for table "users"
   -> 0.0651s
-- add_index(:users, :email, {:unique=>true})
   -> 0.0053s
-- add_index(:users, :reset_password_token, {:unique=>true})
   -> 0.0064s
==  DeviseCreateUsers: migrated (0.0772s) =====================================

Migrating to CreateCollections (20130409185434)
==  CreateCollections: migrating ==============================================
-- create_table(:collections)
NOTICE:  CREATE TABLE will create implicit sequence "collections_id_seq" for serial column "collections.id"
NOTICE:  CREATE TABLE / PRIMARY KEY will create implicit index "collections_pkey" for table "collections"
   -> 0.0079s
==  CreateCollections: migrated (0.0079s) =====================================

Migrating to AddUsernameToUser (20130409204719)
==  AddUsernameToUser: migrating ==============================================
-- add_column(:users, :username, :string)
   -> 0.0033s
==  AddUsernameToUser: migrated (0.0035s) =====================================

Migrating to AddConfirmationToUsers (20130409210245)
==  AddConfirmationToUsers: migrating =========================================
-- change_table(:users)
   -> 0.0188s
==  AddConfirmationToUsers: migrated (0.0189s) ================================

Migrating to CreateProfiles (20130409214143)
==  CreateProfiles: migrating =================================================
-- create_table(:profiles)
NOTICE:  CREATE TABLE will create implicit sequence "profiles_id_seq" for serial column "profiles.id"
NOTICE:  CREATE TABLE / PRIMARY KEY will create implicit index "profiles_pkey" for table "profiles"
   -> 0.0090s
==  CreateProfiles: migrated (0.0091s) ========================================

Migrating to AddAttachmentAvatarToProfiles (20130409223201)
==  AddAttachmentAvatarToProfiles: migrating ==================================
-- change_table(:profiles)
   -> 0.0053s
==  AddAttachmentAvatarToProfiles: migrated (0.0053s) =========================

Migrating to AddUserReferenceToProfiles (20130410001037)
==  AddUserReferenceToProfiles: migrating =====================================
-- change_table(:profiles)
   -> 0.0017s
==  AddUserReferenceToProfiles: migrated (0.0018s) ============================

Migrating to AddUserToCollections (20130410043008)
==  AddUserToCollections: migrating ===========================================
-- add_column(:collections, :user_id, :integer)
   -> 0.0014s
==  AddUserToCollections: migrated (0.0015s) ==================================

Migrating to CreateProjects (20130410171658)
==  CreateProjects: migrating =================================================
-- create_table(:projects)
NOTICE:  CREATE TABLE will create implicit sequence "projects_id_seq" for serial column "projects.id"
NOTICE:  CREATE TABLE / PRIMARY KEY will create implicit index "projects_pkey" for table "projects"
   -> 0.0116s
==  CreateProjects: migrated (0.0116s) ========================================

Migrating to AddColumnsToCollections (20130410174035)
==  AddColumnsToCollections: migrating ========================================
-- change_table(:collections)
   -> 0.0048s
==  AddColumnsToCollections: migrated (0.0049s) ===============================

Migrating to MoveCollectionsToProfiles (20130421010024)
==  MoveCollectionsToProfiles: migrating ======================================
-- remove_column(:collections, :user_id, :integer)
rake aborted!
An error has occurred, this and all later migrations canceled:

PG::Error: ERROR:  column "integer" of relation "collections" does not exist
: ALTER TABLE "collections" DROP "integer"/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/connection_adapters/postgresql_adapter.rb:650:in `exec'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/connection_adapters/postgresql_adapter.rb:650:in `block in execute'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract_adapter.rb:280:in `block in log'
/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.13/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract_adapter.rb:275:in `log'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/connection_adapters/postgresql_adapter.rb:649:in `execute'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/schema_statements.rb:279:in `block in remove_column'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/schema_statements.rb:278:in `each'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/schema_statements.rb:278:in `remove_column'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/migration.rb:466:in `block in method_missing'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/migration.rb:438:in `block in say_with_time'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/migration.rb:438:in `say_with_time'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/migration.rb:458:in `method_missing'
/app/db/migrate/20130421010024_move_collections_to_profiles.rb:3:in `change'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/migration.rb:407:in `block (2 levels) in migrate'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/migration.rb:407:in `block in migrate'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:129:in `with_connection'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/migration.rb:389:in `migrate'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/migration.rb:528:in `migrate'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/migration.rb:720:in `block (2 levels) in migrate'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/migration.rb:775:in `call'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/migration.rb:775:in `block in ddl_transaction'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/database_statements.rb:192:in `transaction'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/transactions.rb:208:in `transaction'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/migration.rb:775:in `ddl_transaction'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/migration.rb:719:in `block in migrate'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/migration.rb:700:in `each'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/migration.rb:700:in `migrate'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/migration.rb:570:in `up'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/migration.rb:551:in `migrate'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/railties/databases.rake:193:in `block (2 levels) in <top (required)>'
/app/vendor/bundle/ruby/1.9.1/gems/rake-10.0.4/lib/rake/task.rb:246:in `call'
/app/vendor/bundle/ruby/1.9.1/gems/rake-10.0.4/lib/rake/task.rb:246:in `block in execute'
/app/vendor/bundle/ruby/1.9.1/gems/rake-10.0.4/lib/rake/task.rb:241:in `each'
/app/vendor/bundle/ruby/1.9.1/gems/rake-10.0.4/lib/rake/task.rb:241:in `execute'
/app/vendor/bundle/ruby/1.9.1/gems/rake-10.0.4/lib/rake/task.rb:184:in `block in invoke_with_call_chain'
/app/vendor/bundle/ruby/1.9.1/gems/rake-10.0.4/lib/rake/task.rb:177:in `invoke_with_call_chain'
/app/vendor/bundle/ruby/1.9.1/gems/rake-10.0.4/lib/rake/task.rb:170:in `invoke'
/app/vendor/bundle/ruby/1.9.1/gems/rake-10.0.4/lib/rake/application.rb:143:in `invoke_task'
/app/vendor/bundle/ruby/1.9.1/gems/rake-10.0.4/lib/rake/application.rb:101:in `block (2 levels) in top_level'
/app/vendor/bundle/ruby/1.9.1/gems/rake-10.0.4/lib/rake/application.rb:101:in `each'
/app/vendor/bundle/ruby/1.9.1/gems/rake-10.0.4/lib/rake/application.rb:101:in `block in top_level'
/app/vendor/bundle/ruby/1.9.1/gems/rake-10.0.4/lib/rake/application.rb:110:in `run_with_threads'
/app/vendor/bundle/ruby/1.9.1/gems/rake-10.0.4/lib/rake/application.rb:95:in `top_level'
/app/vendor/bundle/ruby/1.9.1/gems/rake-10.0.4/lib/rake/application.rb:73:in `block in run'
/app/vendor/bundle/ruby/1.9.1/gems/rake-10.0.4/lib/rake/application.rb:160:in `standard_exception_handling'
/app/vendor/bundle/ruby/1.9.1/gems/rake-10.0.4/lib/rake/application.rb:70:in `run'
Tasks: TOP => db:migrate
(See full trace by running task with --trace)