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 ('a9a546e36ba8c0f7f65f4a9ddb9d8c5b', -1, 1505879331, 1505879331, '369c43a4', -4, 0, 0)

Line : 189
File : sessions.php