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 ('4e587d415d1d21a12c302f7638036cd9', -1, 1713419144, 1713419144, '0d3bf3c2', 2, 0, 0)

Line : 187
File : sessions.php