The Quick Base Community will be read-only from August 19th-23rd while we finalize the updates to launch our new community site. On August 23rd the new community site will be live and accessible right here at this same URL with the full launch on August 27th with a special AMA with Jay Jamison on our exciting Cloudpipes news.
If you run into an issue while we are working on our migration you can reach out to our Care team via a Care case for help. There is a link to submit a case right on the Community home page or at our Contact Us page at www.quickbase.com. Thank you for your patience while we work behind the scenes.
The can be only one Proxy field per table. However, when choosing from a drop down list, you are free to specify and report to use as your record picker. Maybe that is what you are thinking of. ie different fields being used to pick records.