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 ('fb7c4d0b7c004bbb9edfbffc4b0a6c21', -1, 1490574983, 1490574983, '369d035c', -10, 0, 0)

Line : 189
File : sessions.php