phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './lac_xmb1/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 ('dc3602f78955e6409d4e9723bd237c95', -1, 1487579336, 1487579336, '3690c2a1', 15, 0, 0)

Line : 187
File : sessions.php