Solve Error PHP - Fatal error: Uncaught mysqli_sql_exception: Column ' ' cannot be null in MySQL

SOLVE - Fatal error: Uncaught mysqli_sql_exception: Column 'topic' cannot be null
FIX - Fatal error: Uncaught mysqli_sql_exception: Column 'topic' cannot be null
Error Fatal error: Uncaught mysqli_sql_exception: Column 'topic' cannot be null

Solve Uncaught mysqli_sql_exception: Column 'image' cannot be null in - Fix “Column ‘…’ cannot be null” in MySQL ---- Xampp-SQL-HTTP- DATABASE