phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './twisty_phpb1/phpbb_sessions' is marked as crashed and should be repaired

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('594e28ec5160fd9ebc2bc56a3c2b01f1', -1, 1513601474, 1513601474, '36f2cd21', 2, 0, 0)

Line : 187
File : sessions.php