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 ('f1406e3da9ce67e8783df3e35a3eaeed', -1, 1508436872, 1508436872, '365c8dd3', 2, 0, 0)

Line : 172
File : sessions.php