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 ('ace9c88ba028fd5d4b68d1d0b8c16aea', -1, 1713911543, 1713911543, '030fdbd9', -7, 0, 0)

Line : 187
File : sessions.php