phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './usr_web420_1/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 ('c6f300226a45b10a064fc055ac1aa5e7', -1, 1454848912, 1454848912, '36a741d9', -1, 0, 0)

Line : 187
File : sessions.php