In Windows:
1. Make a backup of your document.
2. In Word 2016, 2019, 2021, Office 365 (locally installed desktop version only), go to the EndNote™ tab and choose the "Convert Citations and Bibliography > Convert to Unformatted Citations" command.
This will remove the reference list and revert the citations to a temporary format: {Test, 2000 #25}.
3. Press [Ctrl]+A on the keyboard to highlight everything.
4. Press [Ctrl]+6 (above the "T" and "Y" key) to remove any additional hidden field codes.
5. Press [Ctrl]+C to copy the highlighted text.
6. Open a new document and press [Ctrl]+V to paste.
7. On the EndNote (version) tab, click on "Update Citations and Bibliography".
On a macOS:
1. Make a backup of your document.
2. In Word 2016, 2019, 2021, Office 365 (locally installed desktop version only), go to the EndNote tab and select the "Tools > Convert to Unformatted Citations" command.
This will remove the reference list and revert the citations to a temporary format: {Test, 2000 #25}.
3. Press [Command]+A on the keyboard to highlight everything. Note: The [Command] key may be identified as the [Apple] key on some keyboards.
4. Press [Command]+6 (above the "T" and "Y" key) to remove any additional hidden field codes.
5. Press [Command]+C to copy the highlighted text.
6. Open a new document and press [Apple]+V to paste.
7. On the EndNote (version) tab, click on "Update Citations and Bibliography"
Note: If you have citations in the footnotes, you will need to click in the footnotes section and repeat steps 3- 6.
You should now be able to format this cleaned up version of the document without running into problems.
Please note that you may get the "EndNote Select Matching Reference" dialog box when formatting the bibliography. This may be because you have modified the author name or the year in one of the references. Please click at EndNote: Select Matching Reference for information on how to resolve this.