phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './twisty_phpb1/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 ('c6bc2ad5626b5ed2ce782bb0bbfbc6ea', -1, 1513471202, 1513471202, '365270c1', 5, 0, 0)

Line : 187
File : sessions.php