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 ('4e5af3d5380d05840e6d3fea2461071e', -1, 1713955340, 1713955340, '0390e996', -4, 0, 0)

Line : 187
File : sessions.php