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 ('502d2cf4ce19cd93b9aec3ef38498c78', -1, 1713403999, 1713403999, '030e8594', 0, 0, 0)

Line : 187
File : sessions.php