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 ('19cf54786997cd0ada0119da0e6444e8', -1, 1713857938, 1713857938, '12760cde', -4, 0, 0)

Line : 187
File : sessions.php