If items in the list is changed then it throw error

[kailash-elivaas]

There should be exactly one item with [DropdownButtonFormField]'s value: ...
Either zero or 2 or more [DropdownMenuItem]s were detected with the same value
'package:dropdown_button2/src/dropdown_button2.dart':
Failed assertion: line 1045 pos 11: 'items == null ||

the items list has unique value but the items list change and want to reset the value to empty values

[AhmedLSayed9]

Can you provide a minimal reproducible sample?

[kailash-elivaas]

Added code in blow git directory

https://github.com/kkhura/drop_down/tree/main

I need to clear previous value to blank or null not work because of below code

items == null ||
items.isEmpty ||
value == null ||
items.where((DropdownMenuItem item) {
return item.value == value;
}).length ==
1,
"There should be exactly one item with [DropdownButtonFormField]'s value: "
'$value. \n'
'Either zero or 2 or more [DropdownMenuItem]s were detected '
'with the same value',
),

[AhmedLSayed9]

Can you make a minimal sample, please?
You can start with Simple DropdownButton2 with no styling sample at ReadMe and update it to reproduce the issue.

Also, which version of the package you're using?