How to link 2 ODK Forms?

I want to link 2 ODK forms; the first form (F1) allows to add new warehouses and the second form (F2) allows to modify the warehouses previously collected with F1. I am using Google Spreadsheet as my server.
I have read the previous topics posted here but have not found a solution to this problem so far.
If you have some documentation or experiences to share on how I can do this, please feel free.

I'd encourage you to read through to get a sense of what's possible.

If you are using the latest version of Central, we do have experimental support for this baseline/follow-up workflow you are describing. has more on this.

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