MySql Strict error

[tgely]

oscommerce2/catalog/admin/products_expected.php

Line 19 in de0e97d

$OSCOM_Db->exec('update :table_products set products_date_available = "" where to_days(now()) > to_days(products_date_available)');

[22-Aug-2019 19:02:16 Europe/Budapest] PHP Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[22007]: Invalid datetime format: 1292 Incorrect datetime value: '' for column 'products_date_available' at row 29' in \catalog\includes\OSC\OM\Db.php:94
Stack trace:
#0 \catalog\includes\OSC\OM\Db.php(94): PDO->exec('update osc_prod...')
#1 \catalog\admin\products_expected.php(21): OSC\OM\Db->exec('update :table_p...')
#2 {main}
thrown in \catalog\includes\OSC\OM\Db.php on line 94

"Null" would be better than ""