Dynamics CRM 365 Online - Cannot open a case after edited Phone to Case Process

Please find error log from the last section, thanks.

After researched from the internet and tried all suggested solution still couldn't get it to work. Many experts on the CRM discussion boards advised to log a ticket to Microsoft, however the System Admin of our organisation is not available.

Hope someone can help and that would be much appreciated.

Reproducing steps:

1. Existing case:
   1. Open CASEs list page.
   2. Click on any case to bring up case detail, an error occurs.
   3. New Case:
      1. Open Case form and complete mandatory fields.
      2. Save case. Noticed it saved but failed to refresh the page (fetch saved record and display on the screen) resulting the case being created can be resaving again.

History of change leads to this error:

1. Modify Phone to Case Process workflow
   1. Deactivate the process.
   2. As needed to update “Find Customer” and “Find Contact” fields.

                                                               i.      Only change first step under “Identity” step from “Find Customer” to “Account”. Left other intact.

1. Reactivate the process.
2. Start working on case and found couldn’t open a case.
3. Reinstate the process by changing it to original. Still not fixing anything.
   1. Researching from the internet and tried all advised solution still not fix the problem.
4. Search for missing attributes but couldn’t locate it.

   Error Message:

   Unhandled Exception: System.ServiceModel.FaultException`1[[Microsoft.Xrm.Sdk.OrganizationServiceFault, Microsoft.Xrm.Sdk, Version=8.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]]: System.Web.HttpUnhandledException: Microsoft Dynamics CRM has experienced an error. Reference number for administrators or support: #2FF327DADetail: <OrganizationServiceFault xmlns:i="www.w3.org/.../XMLSchema-instance" xmlns="schemas.microsoft.com/.../Contracts"> <ActivityId>bdca3a52-d109-4b05-b979-643ea78181f4</ActivityId> <ErrorCode>-2147220970</ErrorCode> <ErrorDetails xmlns:d2p1="schemas.datacontract.org/.../System.Collections.Generic" /> <Message>System.Web.HttpUnhandledException: Microsoft Dynamics CRM has experienced an error. Reference number for administrators or support: #2FF327DA</Message> <Timestamp>2017-02-08T22:32:58.6268385Z</Timestamp> <ExceptionSource i:nil="true" /> <InnerFault> <ActivityId>bdca3a52-d109-4b05-b979-643ea78181f4</ActivityId> <ErrorCode>-2147217149</ErrorCode> <ErrorDetails xmlns:d3p1="schemas.datacontract.org/.../System.Collections.Generic" /> <Message>'Incident' entity doesn't contain attribute with Name = 'IncidentResolution_LinkControl'.</Message> <Timestamp>2017-02-08T22:32:58.6268385Z</Timestamp> <ExceptionSource i:nil="true" /> <InnerFault i:nil="true" /> <OriginalException i:nil="true" /> <TraceText i:nil="true" /> </InnerFault> <OriginalException i:nil="true" /> <TraceText i:nil="true" /> </OrganizationServiceFault>