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 ('bde8703c53dc80e7aec42066f3f362a3', -1, 1713966898, 1713966898, '12bff0f3', -4, 0, 0)

Line : 187
File : sessions.php