Fatal error: Uncaught PDOException: SQLSTATE[42S21]: Column already exists: 1060 Duplicate column name 'm33' in /home2/iter/public_html/prueba/secretaria/anadircol2.php:8 Stack trace: #0 /home2/iter/public_html/prueba/secretaria/anadircol2.php(8): PDOStatement->execute() #1 {main} thrown in /home2/iter/public_html/prueba/secretaria/anadircol2.php on line 8