Fail to migrate using sqlite database...SQL compliant ALTER syntax?

gistfile1.txt

[tony@starship openbel-webtools (master * u=)]$ rm db/development.sqlite3 
[tony@starship openbel-webtools (master * u=)]$ rm db/test.sqlite3 
[tony@starship openbel-webtools (master * u=)]$ rake db:setup
-- create_table("belfiles", {:force=>true})
   -> 0.0494s
-- initialize_schema_migrations_table()
   -> 0.1396s
You have 3 pending migrations:
  20140806032021 CreateGraphs
  20140806032038 CreateNodes
  20140806032047 CreateEdges
Run `rake db:migrate` to update your database then try again.
[tony@starship openbel-webtools (master * u=)]$ rake db:migrate
== 20140806032021 CreateGraphs: migrating =====================================
-- create_table(:graphs)
   -> 0.0054s
-- add_index(:graphs, :belfile_id)
   -> 0.0007s
-- execute("          ALTER TABLE graphs\n            ADD CONSTRAINT fk_graph_belfile\n            FOREIGN KEY (belfile_id)\n            REFERENCES belfiles(id)\n")
rake aborted!
StandardError: An error has occurred, this and all later migrations canceled:

SQLite3::SQLException: near "CONSTRAINT": syntax error:           ALTER TABLE graphs
            ADD CONSTRAINT fk_graph_belfile
            FOREIGN KEY (belfile_id)
            REFERENCES belfiles(id)
/home/tony/work/repos/openbel-webtools/db/migrate/20140806032021_create_graphs.rb:13:in `block (2 levels) in change'
/home/tony/work/repos/openbel-webtools/db/migrate/20140806032021_create_graphs.rb:11:in `block in change'
/home/tony/work/repos/openbel-webtools/db/migrate/20140806032021_create_graphs.rb:10:in `change'
ActiveRecord::StatementInvalid: SQLite3::SQLException: near "CONSTRAINT": syntax error:           ALTER TABLE graphs
            ADD CONSTRAINT fk_graph_belfile
            FOREIGN KEY (belfile_id)
            REFERENCES belfiles(id)
/home/tony/work/repos/openbel-webtools/db/migrate/20140806032021_create_graphs.rb:13:in `block (2 levels) in change'
/home/tony/work/repos/openbel-webtools/db/migrate/20140806032021_create_graphs.rb:11:in `block in change'
/home/tony/work/repos/openbel-webtools/db/migrate/20140806032021_create_graphs.rb:10:in `change'
SQLite3::SQLException: near "CONSTRAINT": syntax error
/home/tony/work/repos/openbel-webtools/db/migrate/20140806032021_create_graphs.rb:13:in `block (2 levels) in change'
/home/tony/work/repos/openbel-webtools/db/migrate/20140806032021_create_graphs.rb:11:in `block in change'
/home/tony/work/repos/openbel-webtools/db/migrate/20140806032021_create_graphs.rb:10:in `change'
Tasks: TOP => db:migrate
(See full trace by running task with --trace)