If you are getting this message, then according to MS KBase article http://support.microsoft.com/default.aspx?scid=kb;en-us;290945 you need to:
How to Remove the AdHocReviewCycleID Property from Documents
When you send a Word 2002 document in e-mail the AdHocReviewCycleID property is added to the document and the property is assigned a randomly generated GUID value. When you open a document with an AdHocReviewCycleID value, the value is compared to the GUIDs of documents that you have previously created on your computer. If the GUID matches a GUID on your computer, you are prompted with the following dialog:
Do you want to merge changes in DocumentName back into FilePathDocumentName?
To remove the AdHocReviewCycleID property, follow these steps:
| 1. | Open the document. |
| 2. | Click File, click Properties, and then click the Custom tab. |
| 3. | In the Properties window, under the Name heading, click _AdHocReviewCycleID, and then click Delete. |
| 4. | Click OK. |