Redwood PO Change Order - Deleted Attachment Reappears After Adding a New Attachment

Summary:

In the Redwood Purchase Order Change Order page, if an existing attachment is deleted and a new attachment is added within the same change order, the deleted attachment reappears after submission and approval.

Content (please ensure you mask any confidential information):

Steps to reproduce:

1. Create a Change Order for an existing Purchase Order.
2. Delete an existing attachment.
3. Add a new attachment within the same Change Order.
4. Submit and complete the approval process.
5. Reopen the Purchase Order and review the attachments.

Actual result:
The new attachment is added successfully, but the deleted attachment reappears.

Expected result:
The deleted attachment should remain deleted.