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 ('f7b4b0d7097d346b2b0da3e015f8d2c2', -1, 1506216385, 1506216385, '36510849', 0, 0, 0)

Line : 172
File : sessions.php