Erroneous f:convertNumber added

<h:panelGroup>
   <h:inputText id="memberBeanMemberPhoneNumber" maxLength="12" required="true" value="#{memberBean.member.phoneNumber}">
      <f:convertNumber maxIntegerDigits="12"/>
   </h:inputText>
   <h:message for="memberBeanMemberPhoneNumber" styleClass="error"/>
</h:panelGroup>

@NotNull
@Size(min = 10, max = 12)
@Digits(fraction = 0, integer = 12)
@Column(name = "phone_number")
private String phoneNumber;