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 ('12ac1641c47c56e829d98a003c604e08', -1, 1511460998, 1511460998, '3650e3bd', -4, 0, 0)

Line : 187
File : sessions.php