MyBatis: java.sql.SQLException: Invalid java.sql.Types constant value -9 passed to set or update method

Im getting this error when calling a Stored_Procedure in SqlServer from MyBatis:

> ### Error querying database.  Cause: java.sql.SQLException: Invalid java.sql.Types constant value -9 passed to set or update method.
> ### The error may exist in mybatis-mapper/UpstreamMapper.xml
> ### The error may involve callStoredProcedure
> ### The error occurred while executing a query
> ### SQL: {call dbo.get_discount_value(?,?,       ?,?,?,?)}
> ### Cause: java.sql.SQLException: Invalid java.sql.Types constant value -9 passed to set or update method.

Do I need to match the types of the variable in my Stored_Procedure with that of my POJO?

So if these are the variables of Stored_Procedure:

CREATE PROCEDURE [dbo].[get_discount_value]
    @firstname nvarchar(50),
    @lastname nvarchar(10),
    @gender nvarchar(1),
    @dateOfBirth date,
    @age bigint
AS
BEGIN 
 .. SP BODY..

POJO: StoredProcRef.java

public class StoredProcRef {

    String  SP_FirstName= "";
    String  SP_LastName= "";
    String  SP_Gender = "";
    Date    SP_Birthday = null;
    Integer SP_Age = 0;
    String  Output = "";
    ..GETTERS AND SETTERS..
}

MapperXML.xml

<resultMap id = "ReferenceValueParams"  type="StoredProcRef" autoMapping="false" >
      <result property = "SP_FirstName"         column = "SP_FirstName"/>
      <result property = "SP_LastName"          column = "SP_LastName"/>
      <result property = "SP_Gender"            column = "SP_Gender"/>
      <result property = "SP_Birthday"          column = "SP_Birthday"/>
      <result property = "SP_Age"               column = "SP_Age"/>
      <result property = "Output"               column = "DiscountValue"/>
   </resultMap>   

        <select id = "callStoredProcedure" statementType = "CALLABLE" resultMap="ReferenceValueParams">
              {call dbo.lab_get_result_form_field(
     #{SP_FirstName,mode=IN,jdbcType=NVARCHAR},
     #{SP_LastName,mode=IN,jdbcType=NVARCHAR},
     #{SP_Gender,mode=IN,jdbcType=NVARCHAR},
     #{SP_Birthday,mode=IN,jdbcType=DATE},
     #{SP_Age,mode=IN,jdbcType=BIGINT},
     #{Output,mode=OUT,jdbcType=NVARCHAR}
    )}
      </select> 

Interfacemapper.java

public interface UpstreamXmlMapper {   
         public List<Map<String, ?>> callStoredProcedure(String FirstName, String LastName, String gender, Date dateOfBirth, Integer age);
}

Service.java

    public List<Map<String, ?>> getDiscountValue( StoredProcRef storedProcRef ) {

                List<Map<String, ?>> referenceValue = new ArrayList<>();
                SqlSession session = MyBatisUtil.getSqlSessionFactory().openSession();
                try {
                    UpstreamXmlMapper applicationMapper = session.getMapper(UpstreamXmlMapper.class);
                    referenceValue = applicationMapper.callStoredProcedure(storedProcRef.getSP_FirstName(), storedProcRef.getLastName(), storedProcRef.getSP_Gender(), storedProcRef.getSP_Birthday(), storedProcRef.getSP_Age()) ;

                    session.commit();
                } catch (Exception e) {
                    LOGGER.error(e);
                } finally {
                    session.close();
                }
                return referenceValue;          
        }       

Main.java

        SimpleDateFormat sdf = new SimpleDateFormat("dd-MMM-yyyy");
        sdf.setTimeZone(TimeZone.getTimeZone("GMT"));
        Date date;
        date = sdf.parse("01-Oct-1984");

        List<StoredProcRef> storedProcRefList = new ArrayList<>();
        StoredProcRef storedProcRefObj = new StoredProcRef();
        storedProcRefObj.setSP_Age(28);
        storedProcRefObj.setSP_Birthday(date);
        storedProcRefObj.setSP_Gender("M");
        storedProcRefObj.setSP_FirstName("Joe");
        storedProcRefObj.setSP_LastName("Higashi");
        storedProcRefList.add(storedProcRefObj);

        List<Map<String, ?>> referenceValue = new ArrayList<>();
        referenceValue = service.getDiscountvalue(storedProcRefList.get(0));