SQL - Error with PostGreSQL Server

When I put in the Block and configure it, there ist an unexpected error:
SQLSTATE[42601]: Syntax error: 7 FEHLER: Syntaxfehler bei »86400« LINE 1: SELECT MIN(timestamp) DIV 86400 * 86400 AS timestamp, COUNT(... ^: SELECT MIN(timestamp) DIV 86400 * 86400 AS timestamp, COUNT(*) AS records_count FROM {watchdog} watchdog WHERE severity = :db_condition_placeholder_0 GROUP BY timestamp DIV 86400 LIMIT 10 OFFSET 0; Array ( [:db_condition_placeholder_0] => 3 )

I have a PostGreSQL Server and Drupal 8.4.4

greetz,
Kal