Getting below error

Notice: Undefined index: column in /var/www/html/TTM/vendor/magento/framework/Setup/Declaration/Schema/Declaration/SchemaBuilder.php on line 196

  • When are you getting this error? During setup:upgrade? – Marisa Jan 16 at 17:41
  • @Marisa, yes during the setup upgrade and also facing SQLSTATE[23000]: Integrity constraint violation: Can't write duplicate key in table error, I am not sure why this kind of error getting with my existing DB. – Prasanna Jan 17 at 6:02

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