Error while adding list of grid view widget('package:reorderable_grid_view/reorderable_grid_view.dart': Failed assertion: line 192 pos 12: 'toWrap.key != null': is not true.)

[guruprasadhj]

════════ Exception caught by widgets library ═══════════════════════════════════════════════════════
The following assertion was thrown building ReorderableGridView(dirty, dependencies: [_EffectiveTickerMode], state: _ReorderableGridViewState#af733(tickers: tracking 1 ticker)):
'package:reorderable_grid_view/reorderable_grid_view.dart': Failed assertion: line 192 pos 12: 'toWrap.key != null': is not true.

The relevant error-causing widget was:
ReorderableGridView file:///D:/workspace/ziya_launcher/lib/main.dart:54:21
When the exception was thrown, this was the stack:
#2 _ReorderableGridViewState._wrap (package:reorderable_grid_view/reorderable_grid_view.dart:192:12)
#3 _ReorderableGridViewState.build (package:reorderable_grid_view/reorderable_grid_view.dart:341:20)
#4 StatefulElement.build (package:flutter/src/widgets/framework.dart:4691:27)
#5 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4574:15)
#6 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4746:11)
...
════════════════════════════════════════════════════════════════════════════════════════════════════

[huhuang03]

Looks like you need specify a key to the grid child.

return Card(
    // specify a key.
    key: ValueKey(text),
    child: Text(text),
);

[huhuang03]

I will close the issuse because it's seems solved. Please reopen it if still happen.