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 ('a4b785a63bf8f1f4d8ab0993298b7b9b', -1, 1511474713, 1511474713, '36a2f128', -1, 0, 0)

Line : 189
File : sessions.php