Error when executing rake db:schema:load

Hi I’m beginning with rails and I hit this problem trying to deploy my

The local environment is CentOS 5.2 just as the target environment, the
database is Oracle 10g.

Locally all works fine but in the server when I execute the command rake
db:schema:load I have this error:

OCIError: ORA-00955: name is already used by an existing object: CREATE
SEQUENCE bill_datas_seq START WITH 10000

The weird is that the table is created correctly but the rake process

Attached is the schema.rb

I hope some expert has the answer for this problem.