Failed to save data set section error

Hi Lars and team,
I am trying to manage grey fields and it gives me an error “Failed to save section”

Have you experienced this on version 2.27

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Kind Regards,
Munyao Oliver,
+254 718 108 359
omunyao@gmail.com

“Strength does not come from winning. Your struggles develop your strengths. When you go through hardships and decide not to surrender, that is strength.” —Arnold Schwarzenegger