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 ('a4bbd2c55b15706a7b5eafcf4c7f9aae', -1, 1713915524, 1713915524, '12778348', -4, 0, 0)

Line : 187
File : sessions.php