Manual Core Data schema migration without “document changed” warning?

if(upgradeNeeded) {
           NSManagedObjectModel *sourceModel = [NSManagedObjectModel mergedModelFromBundles:VUIModelBundles() orStoreMetadata:meta];

           if(sourceModel == nil) {
               *error = [NSError errorWithDomain:VUIErrorDomainn ode:VUICoreDataErrorCode localizedReason:BWLocalizedString(@"Unable to find original data model for project.")];
               return NO;
           }

           NSManagedObjectModel *destinationModel = [self managedObjectModel];

           NSMigrationManager *migrationManager = [[NSMigrationManager alloc] initWithSourceModel:sourceModel destinationModel:destinationModel];
           NSMappingModel *mappingModel = [NSMappingModel mappingModelFromBundles:VUIModelBundles() forSourceModel:sourceModel destinationModel:destinationModel];
           if(mappingModel == nil) {
               *error = [NSError errorWithDomain:VUIErrorDomain code:VUICoreDataErrorCode localizedReason:BWLocalizedString(@"Unable to find mapping model to convert project to most recent project format.")];
               return NO;
           }

           @try {
               //move file to backup
               NSAssert([url isFileURL], @"store url is not a file URL");

               NSString *tmpPath = [NSString tempFilePath];
               id storeType = [meta objectForKey:NSStoreTypeKey];
               if(![migrationManager migrateStoreFromURL:url
                                                    type:storeType
                                                 options:storeOptions
                                        withMappingModel:mappingModel
                                       toDestinationURL:[NSURLfileURLWithPath:tmpPath]
                                         destinationType:storeType
                                      destinationOptions:storeOptions
                                                   error:error]) {

                   return NO;
               } else {
                   //replace old with new
                   if(![[NSFileManager defaultManager] removeItemAtPath:[url path] error:error] ||
                      ![[NSFileManager defaultManager] moveItemAtPath:tmpPath toPath:[url path] error:error]) {
                       return NO;
                   }

                   // update document file modification date to prevent warning (#292)
                   NSDate *newModificationDate = [[[NSFileManager defaultManager] fileAttributesAtPath:[url path] traverseLink:NO] bjectForKey:NSFileModificationDate];
                   [self setFileModificationDate:newModificationDate];
               }
           }
           @finally {
               [migrationManager release];
           }
       }
   }

   return [super configurePersistentStoreCoordinatorForURL:url ofType:fileType modelConfiguration:configuration storeOptions:storeOptions error:error];