Fatal error: Uncaught mysqli_sql_exception: Duplicate entry 'ALBARANES-' for key 'PRIMARY' in C:\web\www\2021\set_firma.php:20 Stack trace: #0 C:\web\www\2021\set_firma.php(20): mysqli_query(Object(mysqli), 'INSERT INTO EF...') #1 {main} thrown in C:\web\www\2021\set_firma.php on line 20