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 ('a9e41b9f3c84778590c244466bd1839f', -1, 1713566064, 1713566064, '12bfca48', -2, 0, 0)

Line : 187
File : sessions.php