TF221161: There are conflicting definitions of the following work item fields in the warehouse

This is the error message in the Application Event Log on tfsserver:

 
Log Name:      Application
Source:        TFS Services
Date:          1/10/2011 2:04:39 PM
Event ID:      3300
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      TFSSERVER
Description:
TF53010: The following error has occurred in a Team Foundation component or extension:
Date (UTC): 1/10/2011 7:04:39 PM
Machine: TFSSERVER
Application Domain: TfsJobAgent.exe
Assembly: Microsoft.TeamFoundation.Framework.Server, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a; v2.0.50727
Service Host:
Process Details:
  Process Name: TFSJobAgent
  Process Id: 1924
  Thread Id: 7972
  Account name: DOMAIN\TFS_Service

 

Detailed Message:
  Adapter: Microsoft.TeamFoundation.WorkItemTracking.WorkItemTrackingWarehouseAdapter
  Team Project Collection: sitename
TF221161: There are conflicting definitions of the following work item fields in the warehouse: Microsoft.VSTS.Common.BusinessValue<->Microsoft.VSTS.Common.BusinessValue (Direct). These conflicting definitions come from different project collections. Work items from project collection sitename will not be updated until the conflict is resolved. You can resolve the conflict by making the definitions of the field the same in all project collections, or marking the field as non-reportable in the project collection sitename. For more information, see the Microsoft Web site (http://go.microsoft.com/fwlink/?LinkId=160807).
Event Xml:
<Event xmlns=”http://schemas.microsoft.com/win/2004/08/events/event“>
  <System>
    <Provider Name=”TFS Services” />
    <EventID Qualifiers=”0″>3300</EventID>
    <Level>2</Level>
    <Task>0</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime=”2011-01-10T19:04:39.000000000Z” />
    <EventRecordID>23554</EventRecordID>
    <Channel>Application</Channel>
    <Computer>TFSSERVER.DOMAIN.local</Computer>
    <Security />
  </System>
  <EventData>
    <Data>TF53010: The following error has occurred in a Team Foundation component or extension:
Date (UTC): 1/10/2011 7:04:39 PM
Machine: TFSSERVER
Application Domain: TfsJobAgent.exe
Assembly: Microsoft.TeamFoundation.Framework.Server, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a; v2.0.50727
Service Host:
Process Details:
  Process Name: TFSJobAgent
  Process Id: 1924
  Thread Id: 7972
  Account name: DOMAIN\svcTFS_Service
Detailed Message:
  Adapter: Microsoft.TeamFoundation.WorkItemTracking.WorkItemTrackingWarehouseAdapter
  Team Project Collection: ewholesale
TF221161: There are conflicting definitions of the following work item fields in the warehouse: Microsoft.VSTS.Common.BusinessValue&lt;-&gt;Microsoft.VSTS.Common.BusinessValue (Direct). These conflicting definitions come from different project collections. Work items from project collection ewholesale will not be updated until the conflict is resolved. You can resolve the conflict by making the definitions of the field the same in all project collections, or marking the field as non-reportable in the project collection ewholesale. For more information, see the Microsoft Web site (http://go.microsoft.com/fwlink/?LinkId=160807).</Data>
  </EventData>
</Event>

​ Following this document on MSDN:

http://msdn.microsoft.com/library/ee921480(VS.100).aspx

Open the VS command prompt and run the following:

witadmin listfields /collection:http://xxxxxx:8080/tfs/sitename