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 ('85f737349d89af353ca6fc0f33dc03e0', -1, 1714025399, 1714025399, '12be9c50', -4, 0, 0)

Line : 187
File : sessions.php