check the managed-schema to see if the _root_ field is defined.
> 2022年6月11日 23:58，slly <[email protected]> 写道：
>
> Hello everyone.
> We recently upgraded the online version from Solr 7 to 8.11, we found a very
> strange problem.
>
>
> Before upgrade, we wrote a row of data, the id is uniqueKey.
> id=1, name=alice, age=10
> After upgrade, we write three rows of data and id=2 is repeated.
> id=1, name=alice2, age=11
> id=2, name=nick, age=30
> id=2, name=nick2, age=31
>
>
> We found NumFound=2 when querying with debugQuery=true&q=id:1, and NumFound=1
> when querying with debugQuery=true&q=id:3
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>
> For historical data, the default 'overwrite' is false?
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> Thanks.
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