src/java.base/share/classes/java/nio/file/FileSystemAlreadyExistsException.java

*** 33,42 ****
--- 33,43 ----
   */
  
  public class FileSystemAlreadyExistsException
      extends RuntimeException
  {
+     @java.io.Serial
      static final long serialVersionUID = -5438419127181131148L;
  
      /**
       * Constructs an instance of this class.
       */