Update row in a data table is not working

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Hello,
Write something there :

The image shows a section of code that checks if a "Comments" field is null or empty and sets it to a default message "Phone number and email exists" if it is. (Captioned by AI)
The image shows a section of code that checks if a "Comments" field is null or empty and sets it to a default message "Phone number and email exists" if it is. (Captioned by AI)655×127 22.4 KB