Data connection alias issues when migrating workflows using admin API

[khu822]

Hi, Community,

I'm working on migrating workflows using Admin API from server A to server B,

What I have done so far:

1.  Call admin API to download YXZP from server A to local   
2. Setup the gallery data connections in Server A and Server B with the same names.
3. Update YXZP workflow XML from Server A data connectionId to Server B data connectionId, once finished, re-zip to YXZP.
4. Publish updated YXZP to Server B, but got unable to translate alias error message.

Based on the posts here and here, we need to either attach __temporaryalis.xml within yxzp or sync galleryalias.xml, so here comes to the questions:

1. Where to find _temporaryalias.xml file? I tried to upload one package with the data connection asset checked, download it and extract from YXZP but can't find it.
2. How to sync Gallery alias XML? Do we need to go to the server machine and trigger sync? What exactly will be updated in the file?

Thank you for any help!

Kun