Django Error / Value Too Long For Type Character Varying(1)

I'm trying to add new formset field to my model/forms, but when i want save it, i gets an error ' value too long for type character varying(1)'. Can anyone help me with that? I'm b

Solution 1:

You've declared study_1 to be a character field with a maximum length of 1 character, but you're setting it with four-digit strings representing years.

Solution 2:

change the max_length of study_1 to 4 or more and then make a migration of your changes by python manage.py makemigrations. Finally apply changes by python manage.py migrate.