Problem: nft module store is not initialized

Solution:
- call SetStoreLoader to initialise nft module store

app/app.go

@@ -26,6 +26,7 @@ import (
 	"github.com/cosmos/cosmos-sdk/server/api"
 	"github.com/cosmos/cosmos-sdk/server/config"
 	servertypes "github.com/cosmos/cosmos-sdk/server/types"
+	storetypes "github.com/cosmos/cosmos-sdk/store/types"
 	"github.com/cosmos/cosmos-sdk/testutil/testdata"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/types/module"
@@ -414,6 +415,27 @@ func New(
 	)
 	app.SetEndBlocker(app.EndBlocker)
 
+	planName := "v2.0.0"
+	app.UpgradeKeeper.SetUpgradeHandler(planName, func(ctx sdk.Context, _ upgradetypes.Plan) {
+		// https://github.com/crypto-org-chain/chain-main/blob/master/doc/architecture/adr-003.md
+	})
+
+	upgradeInfo, err := app.UpgradeKeeper.ReadUpgradeInfoFromDisk()
+	if err != nil {
+		panic(err)
+	}
+
+	if upgradeInfo.Name == planName && !app.UpgradeKeeper.IsSkipHeight(upgradeInfo.Height) {
+		storeUpgrades := storetypes.StoreUpgrades{
+			Added:   []string{nfttypes.StoreKey},
+			Renamed: []storetypes.StoreRename{},
+			Deleted: []string{},
+		}
+
+		// configure store loader that checks if version == upgradeHeight and applies store upgrades
+		app.SetStoreLoader(upgradetypes.UpgradeStoreLoader(upgradeInfo.Height, &storeUpgrades))
+	}
+
 	if loadLatest {
 		if err := app.LoadLatestVersion(); err != nil {
 			tmos.Exit(err.Error())
@@ -433,10 +455,6 @@ func New(
 	app.ScopedIBCKeeper = scopedIBCKeeper
 	app.ScopedTransferKeeper = scopedTransferKeeper
 
-	app.UpgradeKeeper.SetUpgradeHandler("v2.0.0", func(ctx sdk.Context, _ upgradetypes.Plan) {
-		// https://github.com/crypto-org-chain/chain-main/blob/master/doc/architecture/adr-003.md
-	})
-
 	return app
 }
 

default.nix

@@ -23,7 +23,7 @@ let
   lib = pkgs.lib;
   build-chain-maind = { ledger_zemu ? false, network ? "mainnet" }: pkgs.buildGoApplication rec {
     pname = "chain-maind";
-    version = "1.2.0";
+    version = "2.0.0";
     src = lib.cleanSourceWith {
       name = "src";
       src = lib.sourceByRegex ./. src_regexes;