I also have the following message:
MyApp currently uses the following deprecated features:
- The "page_id" field in the FQL validation table. Use "target_id" instead.
- The 'version' field in the group's FQL table and in the Graph API.
- Potentialless comments. See the Developer Roadmap for more information on this change.
I am sure that in my case the warning is being output from my Graph API and my Django test code. This means that Facebook logs every request sent by your application and sends you a warning, even if you used outdated functions only once. check this
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