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 ('59b7796c5cae2a6fd1927a5778091456', -1, 1713984493, 1713984493, '1275b6b3', -4, 0, 0)

Line : 187
File : sessions.php