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 ('8e2263bdd8cb2ccbcdd6c81e4e5eb5f8', -1, 1713568831, 1713568831, '0395fe23', 2, 0, 0)

Line : 187
File : sessions.php