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 ('b2a799ad7caf64b7ce10ce22de47fc69', -1, 1550318453, 1550318453, '36eb37fd', -4, 0, 0)

Line : 186
File : sessions.php