DRAFT
Newly created agreement.
APPROVED
When the agreement went successfully through the workflow (or when there is none).
OPEN
This state is no longer used.
CLOSED
This state is no longer used.
REVOKED
When the user clicked the Revoke button.
INVALIDATED
When the agreement was not yet (fully) approved.
SUPERSEEDED
When the user created a revision of an existing rebate agreement, and that agreement was submitted but not yet (fully) approved.