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 ('250e4cdf356396c9c9eca01a18f33160', -1, 1508673019, 1508673019, '36a7cab8', 4, 0, 0)

Line : 187
File : sessions.php