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 ('0e9c5757ccd4bf3d0f5d4e6248d41103', -1, 1508489742, 1508489742, '36a29a5b', 21, 0, 0)

Line : 189
File : sessions.php