What does the SOLR undefined field boolean exception mean in Alfresco?

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The SOLR undefined field boolean exception in Alfresco typically occurs when performing a search query that includes a boolean value for a field that is not defined in the SOLR schema. This means that the search engine is unable to find the field, and as a result, it throws an exception indicating that the field is undefined. To resolve this issue, you may need to update the SOLR schema to include the missing field or modify your search query to remove the reference to the undefined field.