phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1194 Table '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 ('192becb61a9b83d18ea345679499b81a', -1, 1406747613, 1406747613, '36c4cc2a', -4, 0, 0)

Line : 187
File : sessions.php