phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './phpBB/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 ('5375d3f796159cdfe0b2cf690ca06c71', -1, 1481388843, 1481388843, '369fbd8b', 26, 0, 0)

Line : 187
File : sessions.php