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 ('70a13937da9cd4b7af1b10739e7fd99b', -1, 1508489684, 1508489684, '36a29a5b', 34, 0, 0)

Line : 189
File : sessions.php