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 ('a1e14b570ad7256b57a3e1e55f6d9aa6', -1, 1550730334, 1550730334, '22e48f0d', 15, 0, 0)

Line : 189
File : sessions.php