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 ('155bb7e03878160adb4f12528e2a9530', -1, 1713468694, 1713468694, '12daa810', -4, 0, 0)

Line : 187
File : sessions.php