Changing citation styles only changes the first page

ftullits

Today I tried the citation style for a large document to the APA style.

However, no matter what style I change to, only the very first page of the document actually changes.


I'd be very grateful if anyone could help me with this.

damnation

Are all citations active citations or just on the first page?
https://www.zotero.org/support/kb/existing_citations_not_detected