After upgrading to 2016 and when trying to advance a stage in a business process flow for an opportunity that existed before the upgrade, an error popups up. Depending on the business process the message will reference either a missing OpportunitySalesProcess (shown below) or a missing leadtoopportunitysalesprocess. Newly created opportunities after the upgrade re able to advance through the stages without any issue. I'm guessing the upgrade process broke some workflow references or something. Any ideas?
Unhandled Exception: System.ServiceModel.FaultException`1[[Microsoft.Xrm.Sdk.OrganizationServiceFault, Microsoft.Xrm.Sdk, Version=8.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]]: OpportunitySalesProcess With Id = 35ece73e-f042-e611-80cb-005056ba6ac4 Does Not ExistDetail:
<OrganizationServiceFault xmlns:i="www.w3.org/.../XMLSchema-instance" xmlns="schemas.microsoft.com/.../Contracts">
<ActivityId>21298051-2c58-4dbb-8004-2e5aa0f17241</ActivityId>
<ErrorCode>-2147220969</ErrorCode>
<ErrorDetails xmlns:d2p1="schemas.datacontract.org/.../System.Collections.Generic" />
<Message>OpportunitySalesProcess With Id = 35ece73e-f042-e611-80cb-005056ba6ac4 Does Not Exist</Message>
<Timestamp>2018-09-20T14:09:51.3851842Z</Timestamp>
<ExceptionSource i:nil="true" />
<InnerFault i:nil="true" />
<OriginalException i:nil="true" />
<TraceText>
[Microsoft.Crm.ObjectModel: Microsoft.Crm.ObjectModel.GlobalActiveStagePlugin]
[bb48066e-f22f-412f-a530-91f72e4b859b: GlobalActiveStagePlugin]
</TraceText>
</OrganizationServiceFault>