Invalid node state: Cannot load settings into node; it is executing or has executing successors

Hi all! I have a problem. When I try to change read file for Excel Writer node I get that message:

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Warning
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Invalid node state:
Cannot load settings into node; it is executing or has executing successors
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OK   
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What it means?

Hi Goger,

Could you please share an example workflow that shows the error?

Thank you,

Vincenzo