Error "duplicate key: CA8D: duplicate" in TestGenesisExportImport

When running the wasmd tests in a loop (current main) with

```
while go test -count=1 ./... ; do :; done
```

I just got this error

```
--- FAIL: TestGenesisExportImport (0.23s)
store.go:206: DBG loadVersion ver=0
store.go:244: DBG loadVersion commitID hash= key="KVStoreKey{0x140011d67c0, wasm}" ver=0
store.go:63: INF Upgrading IAVL storage for faster queries + execution on live state. This may take a while commit=436F6D6D697449447B5B5D3A307D store_key="KVStoreKey{0x140011d67c0, wasm}" version=0
store.go:77: DBG Finished loading IAVL tree
genesis_test.go:90:
Error Trace: /CosmWasm/wasmd/x/wasm/keeper/genesis_test.go:90
Error: Received unexpected error:

github.com/CosmWasm/wasmd/x/wasm/keeper.Keeper.importContractState
/CosmWasm/wasmd/x/wasm/keeper/keeper.go:1053
github.com/CosmWasm/wasmd/x/wasm/keeper.TestGenesisExportImport
/CosmWasm/wasmd/x/wasm/keeper/genesis_test.go:89
duplicate key: CA8D: duplicate
Test: TestGenesisExportImport
FAIL
FAIL github.com/CosmWasm/wasmd/x/wasm/keeper 9.101s
```