diff --git a/chrome/content/zotero/xpcom/data/library.js b/chrome/content/zotero/xpcom/data/library.js
index 24884a9013..51d61d3136 100644
--- a/chrome/content/zotero/xpcom/data/library.js
+++ b/chrome/content/zotero/xpcom/data/library.js
@@ -291,10 +291,12 @@ Zotero.Library.prototype._set = function(prop, val) {
 			if (newVal != val) {
 				throw new Error(`${prop} must be an integer (${typeof val} '${val}' given)`);
 			}
+			// Ensure that it is never decreasing, unless it is being set to -1
+			// by Reset File Sync History
+			if (val != -1 && val < this._libraryStorageVersion) {
+				throw new Error(prop + ' cannot decrease');
+			}
 			val = newVal;
-			
-			// Ensure that it is never decreasing
-			if (val < this._libraryStorageVersion) throw new Error(prop + ' cannot decrease');
 			break;
 		
 		case '_libraryLastSync':
diff --git a/chrome/content/zotero/xpcom/storage/storageLocal.js b/chrome/content/zotero/xpcom/storage/storageLocal.js
index 6d15eedda1..a33c9be365 100644
--- a/chrome/content/zotero/xpcom/storage/storageLocal.js
+++ b/chrome/content/zotero/xpcom/storage/storageLocal.js
@@ -550,6 +550,10 @@ Zotero.Sync.Storage.Local = {
 			}
 			sql = "UPDATE itemAttachments SET syncState=? WHERE itemID IN (" + sql + ")";
 			await Zotero.DB.queryAsync(sql, [this.SYNC_STATE_TO_UPLOAD].concat(params));
+			
+			var library = Zotero.Libraries.get(libraryID);
+			library.storageVersion = -1;
+			await library.save();
 		}.bind(this));
 	},