phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './db123504/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 ('cb0fee0b80ffc4aeb3a7aa5ba5dca2d3', -1, 1511033166, 1511033166, '3650a977', 6, 0, 0)

Line : 187
File : sessions.php