Cannot delete reports

On occasion I have encountered an error while trying to delete reports from the CRM user interface. The specific error message being: "Error occurred while deleting an item from the report server":

The error details are as follows:

Unhandled Exception: System.ServiceModel.FaultException`1[[Microsoft.Xrm.Sdk.OrganizationServiceFault, Microsoft.Xrm.Sdk, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]]: System.Web.HttpUnhandledException: Microsoft Dynamics CRM has experienced an error. Reference number for administrators or support: #9B008CA6Detail:
<OrganizationServiceFault xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.microsoft.com/xrm/2011/Contracts">
  <ErrorCode>-2147220970</ErrorCode>
  <ErrorDetails xmlns:d2p1="http://schemas.datacontract.org/2004/07/System.Collections.Generic" />
  <Message>System.Web.HttpUnhandledException: Microsoft Dynamics CRM has experienced an error. Reference number for administrators or support: #9B008CA6</Message>
  <Timestamp>2012-07-26T08:26:48.1031182Z</Timestamp>
  <InnerFault>
    <ErrorCode>-2147187945</ErrorCode>
    <ErrorDetails xmlns:d3p1="http://schemas.datacontract.org/2004/07/System.Collections.Generic" />
    <Message>Error occurred while deleting an item from the report server.</Message>
    <Timestamp>2012-07-26T08:26:48.1031182Z</Timestamp>
    <InnerFault i:nil="true" />
    <TraceText i:nil="true" />
  </InnerFault>
  <TraceText i:nil="true" />
</OrganizationServiceFault>

The error seems to be caused by the fact that the report has lost its reference back to the reporting services report repository (i.e. CRM org folder under http://<server>/reports).

The easiest way to deal with this issue is to simply upload a working report definition into the errant report. And subsequently you should be able to perform the delete operation.