When installing Community Surveys v.6.3.9 I get the error:

"JInstaller::Instalacja: Błąd SQL 23000, 1048, Column 'created' cannot be null."

Most likely there is an error in the installer. Please help me fix the problem.

EDIT: Everything is working fine now, it turned out that the previous version of the software left old tables in the database. After removing them, the problem was solved.