getAllPendingTasks is failed on OLD FN .80

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ser="http://server.api.nep.mobinets.com/">
<soapenv:Header/>
<soapenv:Body>
<ser:getAllPendingTasks/>
</soapenv:Body>
</soapenv:Envelope>

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body>
<soap:Fault>
<faultcode>soap:Server</faultcode>
<faultstring>Error while loading Tasks No enum constant com.mobinets.nep.fn.model.nep.persist.enums.FnWoTaskStatus.Completed; nested exception is java.lang.IllegalArgumentException: No enum constant com.mobinets.nep.fn.model.nep.persist.enums.FnWoTaskStatus.Completed</faultstring>
<detail>
<ns1:NepFault xmlns:ns1="http://server.api.nep.mobinets.com/">
<errorCode xsi:type="xs:int" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:ns2="http://server.api.nep.mobinets.com/">1</errorCode>
</ns1:NepFault>
</detail>
</soap:Fault>
</soap:Body>
</soap:Envelope>