diff --git a/chrome/content/zotero/xpcom/schema.js b/chrome/content/zotero/xpcom/schema.js
index c1a394bddf..e5463e3e77 100644
--- a/chrome/content/zotero/xpcom/schema.js
+++ b/chrome/content/zotero/xpcom/schema.js
@@ -3451,10 +3451,10 @@ Zotero.Schema = new function(){
 			}
 			
 			else if (i == 122) {
-				await Zotero.DB.queryAsync("INSERT INTO fileTypes VALUES(8, 'ebook')");
-				await Zotero.DB.queryAsync("INSERT INTO fileTypeMIMETypes VALUES(8, 'application/epub+zip')");
+				await Zotero.DB.queryAsync("REPLACE INTO fileTypes VALUES(8, 'ebook')");
+				await Zotero.DB.queryAsync("REPLACE INTO fileTypeMIMETypes VALUES(8, 'application/epub+zip')");
 				// Incorrect, for compatibility
-				await Zotero.DB.queryAsync("INSERT INTO fileTypeMIMETypes VALUES(8, 'application/epub')");
+				await Zotero.DB.queryAsync("REPLACE INTO fileTypeMIMETypes VALUES(8, 'application/epub')");
 			}
 			
 			// TEMP: When adding 123, check whether IA.authorName fix in items.js::_loadAnnotations()