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 ('39a961aaa259f61d5b9447814c2b0b25', -1, 1508555965, 1508555965, '36516e72', -1, 0, 0)

Line : 187
File : sessions.php