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 ('187e0beb575abc199e81c5e9fe9d9135', -1, 1508436986, 1508436986, '365c8dd3', 3, 0, 0)

Line : 172
File : sessions.php