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 ('03c9e89d384c957b240de604a2a2d593', -1, 1713914747, 1713914747, '031042ce', -4, 0, 0)

Line : 187
File : sessions.php