phpBB : Critical Error

if the following error message can not help you to solve the problem,please contact the Administrator. [email protected],please make sure to send the error message together to us,thank you!
Error creating new session


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 ('f67d13010b3c86ea812c7a4d9a638bca', -1, 1615093495, 1615093495, '36ec3adc', 0, 0, 0)

Line : 186
File : sessions.php