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) VALUES ('120352ff12d667b033498fe5f5111ca4', -1, 1757512379, 1757512379, 'd849d814', 20, 0)

Line : 158
File : sessions.php