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Warning: Undefined array key "clave" in C:\newxampp\htdocs\demicilios\guardar_activacion.php on line 6

Fatal error: Uncaught mysqli_sql_exception: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '' at line 6 in C:\newxampp\htdocs\demicilios\guardar_activacion.php:8 Stack trace: #0 C:\newxampp\htdocs\demicilios\guardar_activacion.php(8): mysqli_query(Object(mysqli), '\r\nUPDATE repart...') #1 {main} thrown in C:\newxampp\htdocs\demicilios\guardar_activacion.php on line 8