the group aggregate field name 'org_data.center' cannot be used because $group's field names cannot contain '.'
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$following_pipe[] = [ '$group' => ['_id' => '$' . $groupBy, 'org_data.center' => [ ['$first' => '$org_data.center.longitude'], ['$first' => '$org_data.center.latitude'], ], 'org_data._id' => [ ['$first' => '$_id'], ] ] ];
the group aggregate field 'center' must be defined as an expression inside an object
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