I have changed my DB structure and removed fields (First Name, Last Name, … ) to another (Person) Data Type. Bubble shows me “Current User First Name - deleted” but does not flag this as an Issue which makes it time consuming to find each error.
After the Optimise > Clean > Field Select, the results are flagged “Issues” and I was thus able to work through them one by one and fix them. This is what I needed.
I don’t believe they are saved in the Bubble Settings > Logs and AFAIK you can’t save Issues to a file.