title: PG::DuplicateTable: ERROR: relation "posts" already exists
body: <p>When I run rake db:migrate I get following output:</p>
  <blockquote>
  <p>== 20141219011612 CreatePost: migrating =======================================
  -- create_table(&quot;posts&quot;) rake aborted! StandardError: An error has occurred, this and all later migrations canceled:
  == 20141219011612 Postposts: migrating =======================================
  -- create_table(&quot;posts&quot;) rake aborted! StandardError: An error has occurred, this and all later migrations canceled:</p>
  <p>PG::DuplicateTable: ERROR:  relation &quot;posts&quot; already exists : CREATE
  TABLE &quot;posts&quot; (&quot;id&quot; serial primary key, &quot;post&quot; text, &quot;release_date&quot;
  timestamp, &quot;created_at&quot; timestamp, &quot;updated_at&quot; timestamp)
  /home/admin/.rvm/gems/ruby-2.1.5/gems/activerecord-4.1.8/lib/active_record/connection_adapters/postgresql/database_statements.rb:128:in
  <code>async_exec' /home/admin/.rvm/gems/ruby-2.1.5/gems/activerecord-4.1.8/lib/active_record/connection_adapters/postgresql/database_statements.rb:128:in </code>block in execute'
  /home/admin/.rvm/gems/ruby-2.1.5/gems/activerecord-4.1.8/lib/active_record/connection_adapters/abstract_adapter.rb:373:in <code>block in log' /home/admin/.rvm/gems/ruby-2.1.5/gems/activesupport-4.1.8/lib/active_support/notifications/instrumenter.rb:20:in </code>instrument'
  /home/admin/.rvm/gems/ruby-2.1.5/gems/activerecord-4.1.8/lib/active_record/connection_adapters/abstract_adapter.rb:367:in <code>log' /home/admin/.rvm/gems/ruby-2.1.5/gems/activerecord-4.1.8/lib/active_record/connection_adapters/postgresql/database_statements.rb:127:in </code>execute'
  /home/admin/.rvm/gems/ruby-2.1.5/gems/activerecord-4.1.8/lib/active_record/connection_adapters/abstract/schema_statements.rb:205:in
  <code>create_table' /home/admin/.rvm/gems/ruby-2.1.5/gems/activerecord-4.1.8/lib/active_record/migration.rb:649:in </code>block in method_missing'
  /home/admin/.rvm/gems/ruby-2.1.5/gems/activerecord-4.1.8/lib/active_record/migration.rb:621:in
  <code>block in say_with_time' /home/admin/.rvm/gems/ruby-2.1.5/gems/activerecord-4.1.8/lib/active_record/migration.rb:621:in </code>say_with_time'
  /home/admin/.rvm/gems/ruby-2.1.5/gems/activerecord-4.1.8/lib/active_record/migration.rb:641:in
  `method_missing'</p>
  </blockquote>
  <p>...</p>
  <blockquote>
  <p><code>migrate' /home/admin/.rvm/gems/ruby-2.1.5/gems/activerecord-4.1.8/lib/active_record/railties/databases.rake:34:in </code>block (2 levels) in &lt;top (required)&gt;' Tasks: TOP =&gt; db:migrate (See
  full trace by running task with --trace)</p>
  </blockquote>
  <p>I don't understund how this is possible, bescause In scheme file I don't have post table.</p>