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 ('a5fe4dd53b21f8f9a48d5510a2c95134', -1, 1713558051, 1713558051, '12e095f2', -4, 0, 0)

Line : 187
File : sessions.php