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 ('d15cde0ebcaf1e07f634c520f172a310', -1, 1713571647, 1713571647, '038ac842', 0, 0, 0)

Line : 187
File : sessions.php