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 ('d9ce7e482c7ab04a9e5c4b06e33baaf4', -1, 1508817769, 1508817769, '36a298e8', 9, 0, 0)

Line : 187
File : sessions.php