_draggablecardstate#f7d66(tickers: tracking 1 ticker) was disposed with an active ticker. I/flutter (16505): _draggablecardstate created a ticker via its tickerproviderstatemixin, but at the time dispose() was called on the mixin, that ticker was still active. all tickers must be disposed before calling super.dispose(). I/flutter (16505): tickers used by animationcontrollers should be disposed by calling dispose() on the animationcontroller itself. otherwise, the ticker will leak.
fixing error
_draggablecardstate#f7d66(tickers: tracking 1 ticker) was disposed with an active ticker. I/flutter (16505): _draggablecardstate created a ticker via its tickerproviderstatemixin, but at the time dispose() was called on the mixin, that ticker was still active. all tickers must be disposed before calling super.dispose(). I/flutter (16505): tickers used by animationcontrollers should be disposed by calling dispose() on the animationcontroller itself. otherwise, the ticker will leak.