AI-generated Key Takeaways
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OrderActionError.Reasonenumerates the possible reasons for errors when performing actions on Orders. - 
          
Errors can occur due to insufficient permissions, the order's current state (archived, ended), or issues with associated line items or companies.
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Specific reasons include inability to approve orders with unreserved line items, inability to delete orders with delivered line items, and exceeding the line item limit.
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The
UNKNOWNreason is used for values not exposed in the requested API version. 
The reasons for the target error.
- Namespace
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https://www.google.com/apis/ads/publisher/v202502 
| Enumeration | Description | 
|---|---|
                        PERMISSION_DENIED
                      | 
                     The operation is not allowed due to lack of permissions. | 
                        NOT_APPLICABLE
                      | 
                     The operation is not applicable for the current state of the Order. | 
                        IS_ARCHIVED
                      | 
                     The Order is archived, an OrderAction cannot be applied to an archived order. | 
                        HAS_ENDED
                      | 
                     The Order is past its end date, An OrderAction cannot be applied to a order that has ended. | 
                        CANNOT_APPROVE_WITH_UNRESERVED_LINE_ITEMS
                      | 
                     A Order cannot be approved if it contains reservable LineItems that are unreserved. | 
                        CANNOT_DELETE_ORDER_WITH_DELIVERED_LINEITEMS
                      | 
                     Deleting an Order with delivered line items is not allowed | 
                        CANNOT_APPROVE_COMPANY_CREDIT_STATUS_NOT_ACTIVE
                      | 
                     Cannot approve because company credit status is not active. | 
                        CANNOT_UPDATE_ORDER_OVER_LINE_ITEM_LIMIT
                      | 
                     Cannot update (archive, pause, resume) an Order because it has more than the allowed number of LineItems. | 
                        UNKNOWN
                      | 
                     The value returned if the actual value is not exposed by the requested API version. |