phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './pieniadz_forum/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 ('bd121bd7d161cf6261e3260b4c6fb4e8', -1, 1475254493, 1475254493, '36c491ad', -4, 0, 0)

Line : 188
File : sessions.php