ITEM_ALREADY_OWNED - Code:6777003
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Device: HUAWEI - CLT-L29 - Android: 10 - WebView: 114.0.5735.196
App-Version: 3.1.0 - 1331
Screen: 360 x 747 px - 3dppx
This sounds like you already have a Tourer+ subscription in Google Play. Are you signed in with the correct account? Usually the subscription should be linked to your account already if you purchased it previously.
You can see your subscriptions here.
The Problem is already fixed.
It only takes a few hours until the tourer + was ready to use. Thank you