What fields would you include in creating a new defect tracking program (used by QA, developers, etc)?

It should content following fields:-

Defect Id
Status:- New, Active, Fixed, Resolve, Duplicate, By Design, Closed, Reopen
Assigned to
Source of Defect (Test case or other source)
Stage of origination
Project
Subject
Summary
Description
R&D comments
Reproducible Yes/No
Severity: - Low, Medium, High, Very High, Urgent
Priority: - Low, Medium, High, Very High, Urgent
Detected By
Detected date
Detected in version
Closed in version
Screen print & Logs etc.