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 ('cdd2997d1c16d2c78081d6ed96a30c65', -1, 1506008557, 1506008557, '36e13678', -9, 0, 0)

Line : 187
File : sessions.php