phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 144 Table './muestras_foro/bb_sessions' is marked as crashed and last (automatic?) repair failed

INSERT INTO bb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('97ef84eec85ce37263ea11d791d79a65', -1, 1412143028, 1412143028, '36c503e9', 1, 0, 0)

Line : 187
File : sessions.php