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 ('ab64da94799af1dd5e75de489acc63cc', -1, 1713501758, 1713501758, '12777e50', -2, 0, 0)

Line : 187
File : sessions.php