Overview:
When copying Multichannel Presentation and Slides to another Vault, an error occurs: OPERATION_NOT_ALLOWED cause: Unable to checkout [placeholder] document
Root Cause:
This is expected behavior. The target document contains a placeholder.
Placeholders are not able to be checked out of Vault.
Solution:
The user is required to upload content to the placeholder or remove the placeholder Multichannel Slide document.
Related Documentation:
Vault to Vault Migration Documentation: Copy to Another Vault