Attachment is missing according to change server IP

Dear All,

I have change my server IP address from 192.168.3.45 to 192.168.1.45 and i have change external_url in gitlab.rb.
But when i am looking into issues that has attachments. It is still pointing to old IP address. How can i fix or solved this problem.

Br,
Prasong.p

Here is the sample