API Update content call shows 501 error message

Issue Summary

Updating a page via REST API causes 501 error. 

Steps to Reproduce

1. Try to update the content with the Update API request:

   curl -u 'USER:API-KEY' \
   -X PUT \
   -H 'Content-Type: application/json' \
   -d'{"id":"924844033","type":"page","title":"Test Worked","space":{"key":"MOV"},"body":{"storage":{"value":"<p>This is the updated text for the new page for this test v2</p>","representation":"storage"}},"version":{"number":4}}' https://SITE-NAME.atlassian.net/wiki/rest/api/content/924844033 | python -mjson.tool
   

1. You'll get the below error message:

   {
       "message": "com.atlassian.confluence.internal.synchrony.ExternalChangesException: Trying to access unreconciled content 924844033. Retry in a few moments",
       "statusCode": 501
   }
   

Expected Results

The page is updated accordingly.

Actual Results

A 501 error is received and the page is not updated.

Workaround

There are multiple possible workarounds that can be tried:

1. Run the call again
2. Navigate to the page
3. Reach out to Support
4. Add ?status=current at the end of the endpoint