Meta Graph API v20 expires Sept 24, silently routing calls to v21 without warning

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Meta's Graph API version 20.0 is set to expire on September 24, 2026, after which all calls made to v20 endpoints will be silently redirected to v21 without any error or notification. Unlike vendors that reject calls to deprecated versions, Meta automatically defaults requests to the next available version, meaning dashboards will continue showing HTTP 200 responses even as breaking changes take effect. Several v21 changes will cause visible failures, including the removal of the Messaging Events API, deprecated Insights metrics, and legacy campaign objectives that can no longer be created. More dangerous are the silent changes, particularly the removal of six Instagram User Insights time-series metrics that may cause data pipelines to log quiet warnings and return zeroes rather than surfacing explicit errors. Developers relying on automated ETL jobs are especially at risk, as swallowed exceptions could leave downstream dashboards showing flat or missing data with no clear indication that a migration occurred.

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