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 ('a87b5bfb366c83217be6886b6130b7d8', -1, 1713274379, 1713274379, '038a8a90', 7, 0, 0)

Line : 187
File : sessions.php