Custom Sidebars plugin is NOT compatible…

Hello Sirs,

I got this notice a while ago:
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IMPORTANT ??
Custom Sidebars plugin is NOT compatible with the new widgets edit screen (powered by Gutenberg).
Install the official Classic Widgets plugin if you want to continue using it.
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Should I delete this Custom Sidebars Plugin, and install the official Classic Widgets plugin?

Please advise. Thanks in advance!