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 ('fde722733987da21d70d4f1cd3e5a0cd', -1, 1513325299, 1513325299, '36932899', 0, 0, 0)

Line : 189
File : sessions.php