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 ('5ad40e8e1dd9f2d0c560172b95e2f2cd', -1, 1748168037, 1748168037, '038a97af', 2, 0, 0)

Line : 190
File : sessions.php