You can try with business rules.

Business Rule: Generate Approvals at Authorize Stage

1. Vai a: System Definition > Business Rules
2. Click New
3. Compila:

When to run:

• Name: Generate Approvals - Authorize Stage
• Table: Change Request [change_request]
• When: before
• Insert: false
• Update:  true
• Condition:

current.approval.changes() && current.approval == 'requested' && current.state == '-1' // Authorize state