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Same Input and Output Error

Hello there.
When I try to run the Synchronizing two checklists example code in Advanced Callbacks, I get the Same Input and Output Error saying-

In the callback for output(s):
city-checklist.value
all-checklist.value
Input 1 (all-checklist.value)
matches Output 1 (all-checklist.value)

In the callback for output(s):
city-checklist.value
all-checklist.value
Input 0 (city-checklist.value)
matches Output 0 (city-checklist.value)

Any help in this regard would be much appreciated.
Thank you

Hi @samyu
Try upgrading to the latest version of Dash.

Thank you @AnnMarieW
It worked.

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