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 ('c4b17183031cc1ff530e2c4395bba159', -1, 1713537516, 1713537516, '1276b8ed', -11, 0, 0)

Line : 187
File : sessions.php