phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('dd7849f3e4c2c324675e3e02c9acf542', -1, 1713552440, 1713552440, '0310515e', -9, 0, 0)

Line : 187
File : sessions.php