I do not have track changes on. Zotero does not read in pdf documents correctly on the web, and every time I change one of these citations to the correct one--after deleting and replacing it--when I try to cite it I get the same error message saying it encountered an error (and it messes up the document!). I have been closing and reopening zotero after each one that I changed now. Why is this happening? This has taken me hours of extra time on a huge document and it's pretty infuriating.