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 ('f409c85e90a3d4e4005bc6e32edb5d93', -1, 1419097972, 1419097972, '36f27e7e', -1, 0, 0)

Line : 187
File : sessions.php