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 ('8d097d7ca8abe97e8a1780ba4b3aa635', -1, 1503483122, 1503483122, '17143c8a', 8, 0, 0)

Line : 187
File : sessions.php