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 ('56ce72cd8179d11c5cfabb7a1bdc37b6', -1, 1713732999, 1713732999, '2cd295cd', -1, 0, 0)

Line : 187
File : sessions.php