I replaced an icon in a toolbar I didn't intend to replace - how 2 fix?

Is there a way to reset the icons in just one toolbar? I accidentally overwrote one. I don’t know what it was before, so I have no way of knowing (or do I?) what the original toolbar icon was for that function. It’s the Insert Table function for the Insert Toolbar.

I was surprised that I had to add Hyperlink to the Insert Toolbar. I was changing it’s icon to the standard one, which I had to create because I didn’t have the patience to walk through all the provided icons looking for it. Who knows? It could be in listed.

Thanks!

Click on the dropdown at the right of the toolbar; select Customise Toolbar; click Reset.