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 ('3df8511b693c043c1c128f94e5b40ead', -1, 1713515976, 1713515976, '03913456', -4, 0, 0)

Line : 187
File : sessions.php