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 ('98ae9c36e45e6aee2f76885e21cf3829', -1, 1508672803, 1508672803, '36a7cab8', 4, 0, 0)

Line : 187
File : sessions.php