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 ('b770dd5b2f1e45c0e6de28e18148ce9e', -1, 1711712210, 1711712210, '03ec5104', 3, 0, 0)

Line : 187
File : sessions.php