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 ('aa46f8dd57cd068f61fc4b06fafcb6ed', -1, 1422785366, 1422785366, '36c6669c', -1, 0, 0)

Line : 187
File : sessions.php