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 ('aebdfcf4ba145ae51fe5b9c8f73968fc', -1, 1469278973, 1469278973, '17140a7f', -1, 0, 0)

Line : 187
File : sessions.php