mysqli_sql_exception #1452

I am newer ib C4

I have the next error

mysqli_sql_exception #1452

Cannot add or update a child row: a foreign key constraint fails (`sgnet`.`items`, CONSTRAINT `fk__item_linea` FOREIGN KEY (`id_linea`) REFERENCES `lineas` (`id`))

I search on internet but I not found where i have the mistake
Please can anyone help me

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