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 ('ffa5a8c4fcdf69ae5fe56fb74cbea5f0', -1, 1485011645, 1485011645, '36d3f9db', 7, 0, 0)

Line : 187
File : sessions.php