Null values in the sandbox built-in database

Hello, I got a really big problem, the built-in database in my Mendix app has one row with null values in it. Now an entire data grid doesn't want to load anymore and that's the page where I used to delete such an entry. How can I reset my memory from my online app? All the other mendix forum posts didn't work because my when I delete the default database locally and synchronise the sandbox database won't change. Thanks in front!
1 answers

Can you just create a microflow that cleans up that row, and call that microflow outside the page that is broken? In the microflow, you could retrieve and fix or delete that row/entity.