Line 77: ID "-illion" is already defined here:
<span class="mw-headline" id="-illion">
Non-existent anchors are marked with [Invalid]. These redirects can be retargeted to the correct section or by adding an anchor to the page (e.g.
== Other related media <span id="Video games"></span>==). Incorrect redirects are sometimes caused by bots fixing double redirects.
Specific_numbers_used_as_indefinite might be related
Viewing 36 redirects156 anchor found in Indefinite and fictitious numbers of which 80 were not produced by cite.php