phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './phpbb/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 ('52422fbc3e3dfc32d3765b1f2b3ec975', -1, 1432567199, 1432567199, '17162c00', -1, 0, 0)

Line : 187
File : sessions.php