phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1194 Table '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 ('9d8edae00f6f6c9642dd48196bca52ba', -1, 1475354015, 1475354015, '1716ce67', -1, 0, 0)

Line : 172
File : sessions.php