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 ('9136f491613f4bff1d88a850c7b0ebce', -1, 1714029895, 1714029895, '030ef6fe', -10, 0, 0)

Line : 187
File : sessions.php