Hi, i have read your requirements regarding flask, Please Let me know How can i help you to resolve issues.
I have 4+ years of experience in websites development using Python including Flask, Django, Rest Api, SqlLagi
I have 5+years of experience in Python +Sql.
ii have used SQL alchemy and have done troubleshooting multiple time [login to view URL] your error is familiar to me
Welcoming you to discuss regarding the issue to proceed furtLagi