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 ('13b8bae2d7036cbabd5a1c8b709430ec', -1, 1487931570, 1487931570, 'b849429d', 26, 0, 0)

Line : 320
File : sessions.php