GPON Termination order is created, but we are getting Error while completing Tasks : “No task to complete”

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ser="http://server.api.nep.mobinets.com/">
<soapenv:Header/>
<soapenv:Body>
<ser:arborGPONTerm_fGPONTERM>
<!-Optional:->
<fSubno>44440067</fSubno>
<!-Optional:->
<fWOID>444400172</fWOID>
<!-Optional:->
<fUsage_Type>7</fUsage_Type>
<!-Optional:->
<fOrder_Type>TESR</fOrder_Type>
<!-Optional:->
<fUserID>Mbaye</fUserID>
<!-Optional:->
<arborOrderId>444400072</arborOrderId>
<!-Optional:->
<channel>1</channel>
<!-Optional:->
<surveyDt>Test</surveyDt>
</ser:arborGPONTerm_fGPONTERM>
</soapenv:Body>
</soapenv:Envelope>

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body>
<soap:Fault>
<faultcode>soap:Server</faultcode>
<faultstring>org.springframework.transaction.UnexpectedRollbackException: Transaction silently rolled back because it has been marked as rollback-only</faultstring>
</soap:Fault>
</soap:Body>
</soap:Envelope>