diff --git a/AutoCat/AppDelegate.swift b/AutoCat/AppDelegate.swift
index bca5977..46e6990 100644
--- a/AutoCat/AppDelegate.swift
+++ b/AutoCat/AppDelegate.swift
@@ -133,6 +133,21 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
                         }
                     }
                 }
+                
+                if oldSchemaVersion <= 34 {
+                    var ids: Set<String> = Set()
+                    migration.enumerateObjects(ofType: "VehicleEvent") { old, new in
+                        guard let oldId = old?["id"] as? String? else { return }
+                        
+                        var newId = oldId ?? UUID().uuidString
+                        if ids.contains(newId) {
+                            newId = UUID().uuidString
+                        }
+                        ids.insert(newId)
+                        
+                        new?["id"] = newId
+                    }
+                }
             })
 
 		Realm.Configuration.defaultConfiguration = config