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 ('25b8057099741122c379a8da0818f7d8', -1, 1488235330, 1488235330, '36d3b446', -1, 0, 0)

Line : 187
File : sessions.php