════════ Exception caught by gesture ═══════════════════════════════════════════
The following assertion was thrown while handling a gesture:
ScrollController attached to multiple scroll views.
'package:flutter/src/widgets/scroll_controller.dart':
Failed assertion: line 109 pos 12: '_positions.length == 1'

2

Either the assertion indicates an error in the framework itself, or we should provide substantially more information in this error message to help you determine and fix the underlying cause.
In either case, please report this assertion by filing a bug on GitHub:
  https://github.com/flutter/flutter/issues/new?template=2_bug.md

When the exception was thrown, this was the stack
#2      ScrollController.position
package:flutter/…/widgets/scroll_controller.dart:109
#3      ScrollController.offset
package:flutter/…/widgets/scroll_controller.dart:116
#4      _ReorderableListContentState._scrollTo
package:reorderableitemsview/reorderableitemsview.dart:331
#5      _ReorderableListContentState._wrap.<anonymous closure>.<anonymous closure>
package:reorderableitemsview/reorderableitemsview.dart:631
#6      _DragTargetState.didEnter
package:flutter/…/widgets/drag_target.dart:693
...
Handler: "onStart"
Recognizer: DelayedMultiDragGestureRecognizer#c450e
════════════════════════════════════════════════════════════════════════════════