SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: UPDATE bb1_guthaben_bank SET akt_jahr='2024', crashtag='348', boersencrash='0',boersencrashdate = '', boersencrashaktienwert='', boersencrashprozent='',boersencrashaktienwertneu='' WHERE bankid='1'
mysql error: Incorrect integer value: '' for column `retterradio_db2`.`bb1_guthaben_bank`.`boersencrashaktienwert` at row 1
mysql error number: 1366
mysql version: 10.11.6-MariaDB-0+deb12u1
php version: 7.4.33
Date: 15.05.2024 @ 00:00
Script: /thread.php?goto=lastpost&threadid=8533&sid=360ed66b837d8e4cdf73f49c0f86e458
Referer: http://feuerwehrlive.de/thread.php?goto=lastpost&threadid=8533&sid=360ed66b837d8e4cdf73f49c0f86e458