NEP is rejecting below order with an error:: com.querydsl.core.NonUniqueResultException: Only one result is allowed for fetchOne calls.
Please support to trouble shoot this error.

Note::As shown below getting this error while calling FN service internally.

<NS1:Envelope xmlns:NS1="http://schemas.xmlsoap.org/soap/envelope/">
<NS1:Header>
<NS2:Security
xmlns:NS2="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd">
<NS2:UsernameToken>
<NS2:Username>nep-api-key</NS2:Username>
<NS2:Password
Type="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0#PasswordText">
mobinets@2017</NS2:Password>
</NS2:UsernameToken>
</NS2:Security>
</NS1:Header>
<NS1:Body>
<NS3:arborSingleWO_fCNA xmlns:NS3="http://server.api.nep.mobinets.com/">
<fAppType>I</fAppType>
<fExc>XA54</fExc>
<fCabinet>054M</fCabinet>
<fDpoint>0001</fDpoint>
<fSubno>25884397</fSubno>
<fSubscr_Type>T</fSubscr_Type>
<fWOID>1508942054</fWOID>
<fUsage_Type>2</fUsage_Type>
<fOrder_Type>INST</fOrder_Type>
<fUserID>95394</fUserID>
<arborOrderId>277828781</arborOrderId>
</NS3:arborSingleWO_fCNA>
</NS1:Body>
</NS1:Envelope>

2025-07-07 10:59:24.082 [https-jsse-nio-8451-exec-85] INFO c.m.n.api.server.AuditServiceAdvice - >>> Start calling > arborSingleWO_fCNA
2025-07-07 10:59:24.082 [https-jsse-nio-8451-exec-85] INFO c.m.n.api.server.OrderRequestAdvice - Start --> build Order Request
2025-07-07 10:59:24.082 [https-jsse-nio-8451-exec-85] INFO c.m.n.api.server.OrderRequestAdvice - End --> build Order Request
2025-07-07 10:59:24.082 [https-jsse-nio-8451-exec-85] INFO c.m.n.api.server.OrderRequestAdvice - Start --> fetching Old Record.
2025-07-07 10:59:24.888 [https-jsse-nio-8451-exec-85] INFO c.m.n.api.server.OrderRequestAdvice - End --> fetching Old Record.
2025-07-07 10:59:24.888 [https-jsse-nio-8451-exec-85] INFO c.m.n.api.server.OrderRequestAdvice - Getting Old Order with: woNo1508942054 errorCode: 63 methodName: arborSingleWO_fCNA
2025-07-07 10:59:24.888 [https-jsse-nio-8451-exec-85] INFO c.m.n.api.server.OrderRequestAdvice - Start --> saving request iteration1
2025-07-07 10:59:24.902 [https-jsse-nio-8451-exec-85] INFO c.m.n.api.server.OrderRequestAdvice - End --> saving request iteration1
2025-07-07 10:59:24.902 [https-jsse-nio-8451-exec-85] INFO c.m.n.api.server.OrderRequestAdvice - Start --> invocation.proceed
2025-07-07 10:59:24.902 [https-jsse-nio-8451-exec-85] INFO c.mobinets.toolbox.app.EventProducer - Event was added to the queue: [95394], [ARBORSINGLEWO_FCNA_API_ACTION]
2025-07-07 10:59:24.902 [Thread-4] INFO c.m.t.a.EventProducer$EventConsumer - ...consuming event [95394], [ARBORSINGLEWO_FCNA_API_ACTION]
2025-07-07
2025-07-07 10:59:25.112 [Thread-4] INFO c.m.t.a.EventProducer$EventConsumer - ...consuming event [NEP], [CHECKNEWACTIVATIONCOPPERFEASIBILITY_API_ACTION]
2025-07-07 10:59:25.267 [https-jsse-nio-8451-exec-22] ERROR c.m.nep.api.server.FnServiceImpl - com.querydsl.core.NonUniqueResultException: Only one result is allowed for fetchOne calls
com.mobinets.nep.npt.service.model.NptException: com.querydsl.core.NonUniqueResultException: Only one result is allowed for fetchOne calls

<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
<SOAP-ENV:Header />
<SOAP-ENV:Body>
<ns3:checkNewActivationCopperFeasibility xmlns:ns3="http://server.api.nep.mobinets.com/">
<exchange>XA54</exchange>
<cab>054M</cab>
<dp>0001</dp>
<serviceTypeName>PSTN+ADSL</serviceTypeName>
</ns3:checkNewActivationCopperFeasibility>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body>
<ns2:checkNewActivationCopperFeasibilityResponse
xmlns:ns2="http://server.api.nep.mobinets.com/">
<return>
<responseCode>1</responseCode>
<responseMessage>com.querydsl.core.NonUniqueResultException: Only one result is
allowed for fetchOne calls</responseMessage>
</return>
</ns2:checkNewActivationCopperFeasibilityResponse>
</soap:Body>
</soap:Envelope>