phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '1831cfb1b67fc5387e9a9b3483e9b43a' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('1831cfb1b67fc5387e9a9b3483e9b43a', -1, 1757207313, 1757207313, 'd849d8ab', -4, 0, 0)

Line : 187
File : sessions.php