java.lang.UnsupportedOperationException: Blob may not be manipulated from creating session

Session sess = HibernateUtil.getSessionFactory().openSession();
      byte[] data = getParamByteData(); //Here i am getting byte array for blob field
      Parameters params = new Parameters("Test", data);
      Transaction transaction = null;
      try {
         transaction = sess.beginTransaction();
         sess.save(params);
         transaction.commit();
      } catch (Exception e) {
         e.printStackTrace();
         //System.out.println("Select exception in DM : " + e);
      }

public class Parameters {
   
   private int paramId;
   
   private String paramName;
   
   private byte []paramFile;

   public Parameters(String paramName, byte[] paramFile) {
.
.
..

<hibernate-mapping>
   <class name="com.test.blob.db.Parameters" table="parameters">
      <id name="paramId" column="param_id" type="int">
         <generator class="increment"/>
      </id>
      <property name="paramName">
         <column name="param_name" sql-type="string"/>
      </property>
      <property name="paramFile" column="param_file" type="com.test.blob.db.BinaryBlobType"/>   
   </class>
</hibernate-mapping>