only one element

[kweidler]

It is not possible to create a second element. The first element is created cleanly, but this error message appears for each additional element.
TYPO3 10.4.17
Branch development

Core: Exception handler (WEB): Uncaught TYPO3 Exception: An exception occurred while executing 'UPDATE `tx_a21glossary_domain_model_entry` SET `short` = `short` + 256 + 256 WHERE (`pid` = ?) AND (`deleted` = 0)' with params [3]: Truncated incorrect DOUBLE value: 'THW' | Doctrine\DBAL\Exception\DriverException thrown in file /var/www/html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/AbstractMySQLDriver.php in line 128. Requested URL: ....de/typo3/index.php?route=%%2Frecord%%2Fedit&token=--AnonymizedToken--&edit%%5Btx_a21glossary_domain_model_entry%%5D%%5B3%%5D=new&returnUrl=%%2Ftypo3%%2Findex.php%%3Froute%%3D%%252Fmodule%%252Fweb%%252Flist%%26token%%3D972ebcc47889d842188dde158229c2628c5e2235%%26id%%3D3