A family of Microsoft word processing software products for creating web, email, and print documents.
Position the I-beam directly left of the first character of the first line of the TOC.
Press Shift+F9.
That will reveal the TOC field settings, which will look something like this:
TOC \o "1-3" \h \z \u
Delete the \h part, and press Shift+F9 again.
Then just press F9 and choose to Update the Entire Table.