Cant redeem Google Play promo code, getting "redeem Error code: BM-BQ-01"

Question

I am working on an App that has a premium subscription (as in-app purchase).

we have released it to Google alpha channel and we had given a close group of testers promo codes to test it.

The problem is that when they are trying to redeem the promo code given to them they are getting

Error redeeming code. Error code: BM-BQ-01

when I tried on my phone it works great but for the testers, it's showing that error.

Tried solutions:

• Pay settings set to the same country as Play store
• clear Play store data and cache

Any help will be appreciated

Answer 1

So, apparently in order to redeem a promo code associated with an app you need to have the app installed first in the device.

I would never guest it from "BM-BQ-01".