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 ('f1986dc8fa63ad636edd33b8e5d2ee91', -1, 1542445658, 1542445658, '369f2c36', -2, 0, 0)

Line : 186
File : sessions.php