Sudoku Lösungstechnik Kreuzflügler

Fatal error: Uncaught mysqli_sql_exception: Illegal mix of collations (latin1_german1_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation '=' in /mnt/web513/b3/63/51663363/htdocs/ahr-software/sudoku/solving.php:106 Stack trace: #0 /mnt/web513/b3/63/51663363/htdocs/ahr-software/sudoku/solving.php(106): mysqli->query('SELECT s1.id, s...') #1 {main} thrown in /mnt/web513/b3/63/51663363/htdocs/ahr-software/sudoku/solving.php on line 106