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 ('c7e1fcc68101d261604cf8f2dcac2bcd', -1, 1506216396, 1506216396, '36510849', 1, 0, 0)

Line : 172
File : sessions.php