migration.ts

@NgModule({
  imports: [
    NgxsModule.forRoot([]),
    NgxsStoragePluginModule.forRoot({
      migrations: [
        {
          version: 1,
          key: 'zoo',
          versionKey: 'myVersion',
          migrate: (state) => {
            return {
              newAnimals: state.animals,
              version: 2 // Important to set this to the next version!
            }
          }
        }
      ]
    })
  ],
})
export class MyModule {}