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 ('2d9fd29f1f1d9be8bc92fe1cd85c71a8', -1, 1503059799, 1503059799, '3651471f', 6, 0, 0)

Line : 189
File : sessions.php