申请五年配偶永居等待中，收到下面的邮件。不是很明白，是我以前那里出错了？
也没有给出具体为什么，我可以回复邮件要求写明白到底有什么问题吗？
your application has been made using form Set O for Indefinite Leave to Remain under the PBS Tier 2 Dependant category.
However, we note from your immigration history that you have previously held leave under another non-qualifying category. As such were your application to proceed under this category, it is highly unlikely that your application for settlement would succeed and result in a grant of Indefinite Leave to Remain (ILR). Accordingly, we would like to give you the opportunity to review your application.
If after you have reviewed your application, you would like to vary (change) your application to one in another category, please advise us of your decision within 14 days of the date of this email.
Please note, the transfer of your application does not imply it will accepted, it will still be subject to consideration under the criteria of the new route you have chosen.
If you chose not to vary your ILR application or do not reply within 14 days of the date of this email, your application will then be considered using the criteria of the current application.
If you are unclear about what your choices are, you are strongly urged to consult with an accredited Immigration Adviser for further guidance.
Kind Regards