Hello,
Using Joomla! 3.10.11 -  VirtueMart 3.8.9 10473 php 7.4.33 
I think our Host has upgraded our MySQL version to 8.0.33-25 since yesterday because today we have the error: 
1525 INCORRECT DATETIME VALUE: '' 
when we login to administration and to our Virtuemart shop.
Any hint what to do..
			
			
			
				Hello, did you ever get this resolved? My hosting updated to mysql 8 and getting the same error on some products.  Some products open however products that have a child product are throwing the Incorrect DATETIME value: '' messge.
			
			
			
				Look in your VM tables for Default DATETIME fields with a value of 0000-00-00 00:00:00
MYSQL does not like these