I don’t think the Beam, gen 2, is an eligible speaker for an upgrade, as it is a currently sold device.

The upgrade credit is not initiated from the app, but from your Sonos account online.

However, as Bruce mentions, the Beam (Gen2) is not an eligible product so no discount credit is available from owning it (yet).

You can read the upgrade T&Cs here https://www.sonos.com/en-us/legal/upgrade-terms

​@BoomBaba 

The Beam 2 would most likely only be eligible for a 15% upgrade credit if the information below is any indication of Sonos pass administration of the program. 

However, at the moment the Era 300’s are 20% off on Sonos.com. 

Discount Credit

Following agreement to the Upgrade Program Terms and Conditions, you will receive a Discount Credit in the “My Account” section of sonos.com.

Customers that redeem a CR200, PLAY:5 GEN1 product or certain CONNECT (including ZP80 and ZP90) or CONNECT:AMP (including ZP100 and ZP120) models will receive a Discount Credit equal to 30% off any one (1) regular priced product on sonos.com, with some product restrictions indicated below. Customers that redeem a ARC, ROAM, ROAM SL, SUB GEN1, SUB GEN2, SUB GEN3, MOVE, BEAM GEN1, ONE GEN2, ONE GEN1, ONE SL, PLAY:1, PLAY:3, PLAY:5 GEN2, PLAYBAR, PLAYBASE, or BRIDGE product, or certain CONNECT or CONNECT:AMP models will receive a Discount Credit equal to 15% off any one (1) regular priced product on sonos.com, with some product restrictions indicated below.

MODEL NUMBERS ARE NOT INDICATED EXTERNALLY ON CONNECT AND CONNECT:AMP PRODUCTS. TO VERIFY THE APPLICABLE DISCOUNT CREDIT, YOU CAN LOGIN TO MY ACCOUNT ON SONOS.COM AND VIEW THE APPLICABLE DISCOUNT ON THE SYSTEM OR UPGRADE TAB OR BY CONTACTING SONOS CUSTOMER SUPPORT.

The Discount Credit is valid only at http://www.sonos.com and will not expire until used. The Discount Credit is single use. The Discount Credit cannot be combined with any other promotion, discount or special pricing and may not be used on gift cards, refurbished products, or third party products.