Fetched but not Added Solr 8.6.2

[Anuj Bhargava]

We just installed Solr 8.6.2
It is fetching the data but not adding

Indexing completed. *Added/Updated: 0 *documents. Deleted 0 documents.
(Duration: 06s)
Requests: 1 ,* Fetched: 100* 17/s, Skipped: 0 , Processed: 0

The *data-config.xml*

<dataConfig>
    <dataSource type="JdbcDataSource"
            driver="com.mysql.jdbc.Driver"
            batchSize="-1"
            autoReconnect="true"
            socketTimeout="0"
            connectTimeout="0"
            encoding="UTF-8"
            url="jdbc:mysql://xxxxzeroDateTimeBehavior=convertToNull"
            user="xxx"
            password="xxx"/>
    <document>
        <entity name="countries" query="select * from countries"
                deltaQuery="select posting_id from countries where
last_modified > '${dataimporter.last_index_time}'">
        </entity>
    </document>
</dataConfig>