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 ('36a78e2d6dda849bf194d250a814f29f', -1, 1540168227, 1540168227, '36a14d1e', 28, 0, 0)

Line : 189
File : sessions.php