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“data-vocabulary.org schema deprecated”
Starting April 6, 2020, Google will no longer support data-vocabulary.org structured data to enable rich results in Google Search. From January 20 until April 6, any data-vocabulary.org structured data on a web page will trigger a warning for the appropriate rich result type. After April 6, an error will be triggered. Read the Webmaster Central Blog posting for more background and detail.
https://webmasters.googleblog.com/2020/01/data-vocabulary.html