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 ('bc1cd5a2e826e9176e9bcaaa2d37b78f', -1, 1462391279, 1462391279, '36c4b130', -1, 0, 0)

Line : 187
File : sessions.php