As we don't have crystal ball yet, would you share your code - in python tags as well as full traceback in error tags?
Also it would help if you print (and post here) your SQL statement just before execute it.
Also it would help if you print (and post here) your SQL statement just before execute it.
If you can't explain it to a six year old, you don't understand it yourself, Albert Einstein
How to Ask Questions The Smart Way: link and another link
Create MCV example
Debug small programs
How to Ask Questions The Smart Way: link and another link
Create MCV example
Debug small programs