phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './alexande/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 ('836420b2d3e7ec76d0b032dbc2185df7', -1, 1513340039, 1513340039, '36932899', -11, 0, 0)

Line : 187
File : sessions.php