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 ('b9eca5ca81e1c7e3d231e1097c96104e', -1, 1713468555, 1713468555, '1275a250', 5, 0, 0)

Line : 187
File : sessions.php