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 ('2f5fcfdab0b2decd386d67d4fcc69c11', -1, 1488194024, 1488194024, '369ff2d9', -1, 0, 0)

Line : 172
File : sessions.php