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Fatal error: Uncaught mysqli_sql_exception: Duplicate entry 't' for key 'asistencia.PRIMARY' in C:\Apache24\htdocs\PE17\funcionesbd.php:71 Stack trace: #0 C:\Apache24\htdocs\PE17\funcionesbd.php(71): mysqli_query(Object(mysqli), 'INSERT INTO asi...') #1 C:\Apache24\htdocs\PE17\insertAsistencia.php(6): funciones_BD->regAsistBD(NULL) #2 {main} thrown in C:\Apache24\htdocs\PE17\funcionesbd.php on line 71