The reasons for the target error.
|The operation is not applicable to the current state.
|The operation is not applicable because the containing proposal is not editable.
|The archive operation is not applicable because it would cause some mandatory products to have no unarchived proposal line items in the package.
|The unarchive operation is not applicable because it would cause some mandatory products to have no unarchived proposal line items in the package.
|Sold programmatic ProposalLineItem cannot be unarchived.
|Active ProposalLineItem cannot be archived
|The value returned if the actual value is not exposed by the requested API version.