Saxon

How to run the following xquery?

public static void main(String[] args) {
    System.setProperty("saxon.license", "/Users/haoyu/SMU/llm4pte-rust/engine/saxon-license.lic");
    try {
        Processor processor = new Processor(true); // Pass 'true' for licensed features
        processor.setConfigurationProperty("http://saxon.sf.net/feature/licenseFileLocation", "/Users/haoyu/SMU/llm4pte-rust/engine/saxon-license.lic");

        XQueryCompiler compiler = processor.newXQueryCompiler();
        compiler.setUpdatingEnabled(true);

        XQueryExecutable executable = compiler.compile(
                """
                      
                        xquery version "3.1";
                        declare context item := document {
                          <library>
                              <book id="1">
                                  <title>Programming Rust</title>
                                  <author>Jim Blandy</author>
                                  <price>39.99</price>
                              </book>
                              <book id="2">
                                  <title>Learning Python</title>
                                  <author>Mark Lutz</author>
                                  <price>44.99</price>
                              </book>
                          </library>
                        };
                        (: Update the price of the first book :)
                        replace value of node /library/book[@id='1']/price with '34.99',
                        (: Insert a new book into the library :)
                        insert node\s
                          <book id="3">
                              <title>Effective Java</title>
                              <author>Joshua Bloch</author>
                              <price>45.99</price>
                          </book>
                        into /library,
                        (: Delete the second book from the library :)
                        delete node /library/book[@id='2']
                        (: Return the modified document :)
                        /library
                      """
        );

        XQueryEvaluator evaluator = executable.load();
        Serializer out = processor.newSerializer(System.out);

// out.setOutputProperty(Serializer.Property.METHOD, "xml"); // out.setOutputProperty(Serializer.Property.INDENT, "yes");

        evaluator.run(out);

    } catch (SaxonApiException e) {
        e.printStackTrace();
    }
}

Exception in thread "main" java.lang.IllegalStateException: Query is updating at net.sf.saxon.s9api.XQueryEvaluator.run(XQueryEvaluator.java:462) at XQueryUpdateExample.main(XQueryUpdateExample.java:56)