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 ('abd738c91f8a2e034b7bf772dd83387e', -1, 1503114144, 1503114144, '369c4cf0', -8, 0, 0)

Line : 172
File : sessions.php