Facing Error "The entityname attribute is not a valid attribute for link-entity"

<fetch mapping="logical" version="1.0">
    <entity name="customeraddress">
        <attribute name="exch_altaddresstype" />
        <attribute name="line1" />
        <attribute name="line2" />
        <attribute name="city" />      
        <link-entity name="customeraddress" alias="ab" from="parentid" to="parentid" link-type="inner">
            <filter>
                <condition entityname="ab" attribute="customeraddressid" operator="eq" value="48d50047-66b1-e611-94cd-005056b33beb" />
            </filter>
        </link-entity>
        <filter>
            <condition attribute="exch_altaddresstype" operator="ne" value="119080000" />
            <condition attribute="stateorprovince" operator="not-null" />
        </filter>
    </entity>
</fetch>