I am trying to alert an user from typing an already existing entry in a column. My Column will have values like
Below code here is checking for duplicates but it is doing by letter. For example, if the user were to enter 'k' it displays a duplicate entry message. But, I would like it to display the duplicate message for full text like "Kat-1"," Amp-1" etc.
Can anyone help with this problem?
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