Static Method Hiding and Synchronization

Consider the following code. Which statement best describes the potential concurrency issue that arises from the log method in the StaticDerived class?

class StaticBase {
    public static synchronized void log(String msg) {
        System.out.println("Base log: " + msg);
    }
}

class StaticDerived extends StaticBase {
    public static void log(String msg) {
        // Hidden method without synchronization
        System.out.println("Derived log: " + msg);
    }
}

public class StaticOverrideTest extends Thread {
    public void run() {
        StaticDerived.log("Message");
    }
    
    public static void main(String[] args) {
        Thread t1 = new StaticOverrideTest();
        Thread t2 = new StaticOverrideTest();
        t1.start();
        t2.start();
    }
}