javax package XML output

<GblMsgHdr>
<HdrInfo>
    <HdrVersNbrId>001</HdrVersNbrId>
</HdrInfo>
<MsgResp>
<RespCode>0</RespCode>
</MsgResp>
</GblMsgHdr>

jakarta package XML output

<GblMsgHdr>
<HdrInfo/HdrVersNbrId>001</HdrInfo/HdrVersNbrId>
<MsgResp/RespCode>0</MsgResp/RespCode>
</GblMsgHdr>

XML DTO

@EqualsAndHashCode(callSuper = false)
@NoArgsConstructor
@XmlAccessorType(XmlAccessType.FIELD)
public class RequestHeader {

  public static final String HEADER_VERSION_ID = "001";
  public static final String RESPONSE_CODE = "0";

  @XmlElement(name = "HdrInfo/HdrVersNbrId")
  private String headerVersionId = HEADER_VERSION_ID;

  @XmlElement(name = "MsgResp/RespCode")
  private String responseCode = RESPONSE_CODE;

What could be the reason for this invalid XML output ?