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 ('8c0ae2c520b15aac4f234fa19c8ac1b2', -1, 1713446615, 1713446615, '0390f42c', -7, 0, 0)

Line : 187
File : sessions.php