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 ('78848ed4d8c77067a663e83b9a3ec87b', -1, 1513150004, 1513150004, '3652519a', -1, 0, 0)

Line : 211
File : sessions.php