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 ('a41ee339616ff5191a5dd9d33410adbb', -1, 1713538848, 1713538848, '12d8e93a', 0, 0, 0)

Line : 187
File : sessions.php