SQL Error: SQLSTATE[HY000]: General error: 1267 Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8mb4_general_ci,COERCIBLE) for operation '='



PDOException Object
(
    [message:protected] => SQLSTATE[HY000]: General error: 1267 Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8mb4_general_ci,COERCIBLE) for operation '='
    [string:Exception:private] => 
    [code:protected] => HY000
    [file:protected] => /var/www/vhosts/praxis-ehrenberg.de/httpdocs/_lib/main/db.inc.php
    [line:protected] => 90
    [trace:Exception:private] => Array
        (
            [0] => Array
                (
                    [file] => /var/www/vhosts/praxis-ehrenberg.de/httpdocs/_lib/main/db.inc.php
                    [line] => 90
                    [function] => query
                    [class] => PDO
                    [type] => ->
                )

            [1] => Array
                (
                    [file] => /var/www/vhosts/praxis-ehrenberg.de/httpdocs/_lib/main/db.inc.php
                    [line] => 27
                    [function] => query
                    [class] => TDBSQL
                    [type] => ->
                )

            [2] => Array
                (
                    [file] => /var/www/vhosts/praxis-ehrenberg.de/httpdocs/_lib/database/DB_Artikel.class.php
                    [line] => 414
                    [function] => __construct
                    [class] => TDBSQL
                    [type] => ->
                )

            [3] => Array
                (
                    [file] => /var/www/vhosts/praxis-ehrenberg.de/httpdocs/index.php
                    [line] => 24
                    [function] => loadby_symbol
                    [class] => TArtikel
                    [type] => ::
                )

        )

    [previous:Exception:private] => 
    [errorInfo] => Array
        (
            [0] => HY000
            [1] => 1267
            [2] => Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8mb4_general_ci,COERCIBLE) for operation '='
        )

)