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 ('bfac50b716970eb889bc3e8c54d985fc', -1, 1506448498, 1506448498, '3651585d', -10, 0, 0)

Line : 172
File : sessions.php