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 ('f25a9f98e1bd8c22dc3be805b4d6a49c', -1, 1524550701, 1524550701, '36900e86', 6, 0, 0)

Line : 186
File : sessions.php