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 ('6c8d1535d14cfe7ce9cfd326d2a9db57', -1, 1427850219, 1427850219, '36d3ec34', -4, 0, 0)

Line : 172
File : sessions.php