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 ('3ec2a7ec5d0ef7670b6ef9555daf5e65', -1, 1508240058, 1508240058, '36c68fd2', -9, 0, 0)

Line : 189
File : sessions.php