How to specify the uniqueidentifier datatype of SQL SERVER in XSD type?...

Getting this error:

A type mapping annotation is invalid: The eclass: HbAnnotatedEAttribute does not have an efeature for GenericGenerator (APNX-2-4055-000)

for code: <xsd:element name="prospectName" nillable="true" type="xsd:string">
<xsd:annotation>
<xsd:appinfo source="appian.jpa">
                     @Id
@GenericGenerator(name = "generator", strategy = "guid")
@GeneratedValue(generator = "generator")
@Column(name = "prospect_name" , columnDefinition="uniqueidentifier")
                              </xsd:appinfo>
</xsd:annotation>
</xsd:element>

Getting this error:

A type mapping annotation is invalid: The eclass: HbAnnotatedEAttribute does not have an efeature for GenericGenerator (APNX-2-4055-000)

for code: <xsd:element name="prospectName" nillable="true" type="xsd:string">
<xsd:annotation>
<xsd:appinfo source="appian.jpa">
                     @Id
@GenericGenerator(name = "generator", strategy = "guid")
@GeneratedValue(generator = "generator")
@Column(name = "prospect_name" , columnDefinition="uniqueidentifier")
                              </xsd:appinfo>
</xsd:annotation>
</xsd:element>