phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1114 The table 'phpbb_sessions' is full

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('acb8e098d0977116e50f3c4936f3ebb0', -1, 1436017053, 1436017053, '36a6e85b', 6, 0, 0)

Line : 186
File : sessions.php