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 ('c1bd3cdd5f795b8f1b8033e0bcd2e23b', -1, 1462355168, 1462355168, '36eae027', -1, 0, 0)

Line : 187
File : sessions.php