Error

SQLSTATE[42S22]: Column not found: 1054 Unknown column 'p.knowledge_system' in 'SELECT'

#0 /home/jaonclou/public_html/afnid.org.ng/src/config/database.php(74): PDOStatement->execute(Array)
#1 /home/jaonclou/public_html/afnid.org.ng/src/config/database.php(102): Database->query('SELECT p.id, p....', Array)
#2 /home/jaonclou/public_html/afnid.org.ng/src/controllers/PageController.php(259): Database->fetchAll('SELECT p.id, p....', Array)
#3 /home/jaonclou/public_html/afnid.org.ng/public/index.php(300): PageController->registry()
#4 /home/jaonclou/public_html/afnid.org.ng/public/index.php(242): callHandler('PageController@...', Array)
#5 /home/jaonclou/public_html/afnid.org.ng/public/index.php(366): dispatch()
#6 {main}