Fatal error: Uncaught PDOException: SQLSTATE[23000]: [Microsoft][ODBC Driver 17 for SQL Server][SQL Server]Violation of UNIQUE KEY constraint 'UQ__usuarios__9AFF8FC626641C1F'. Cannot insert duplicate key in object 'dbo.usuarios'. The duplicate key value is (admin). in C:\xampp\htdocs\test.php:9 Stack trace: #0 C:\xampp\htdocs\test.php(9): PDOStatement->execute(Array) #1 {main} thrown in C:\xampp\htdocs\test.php on line 9