Register the params module stuff with the codecs since there's some g…

…ov props with a ParameterChangeProposal in them.

app/app.go

@@ -98,6 +98,7 @@ import (
 	"github.com/cosmos/cosmos-sdk/x/mint"
 	mintkeeper "github.com/cosmos/cosmos-sdk/x/mint/keeper"
 	minttypes "github.com/cosmos/cosmos-sdk/x/mint/types"
+	paramprops "github.com/cosmos/cosmos-sdk/x/params/types/proposal" //nolint:depguard // Need this here to register old types.
 	"github.com/cosmos/cosmos-sdk/x/slashing"
 	slashingkeeper "github.com/cosmos/cosmos-sdk/x/slashing/keeper"
 	slashingtypes "github.com/cosmos/cosmos-sdk/x/slashing/types"
@@ -786,6 +787,10 @@ func New(
 	app.BasicModuleManager.RegisterLegacyAminoCodec(legacyAmino)
 	app.BasicModuleManager.RegisterInterfaces(interfaceRegistry)
 
+	// We removed the params module, but have several gov props with a ParameterChangeProposal in them.
+	paramprops.RegisterLegacyAminoCodec(legacyAmino)
+	paramprops.RegisterInterfaces(interfaceRegistry)
+
 	// NOTE: upgrade module is required to be prioritized
 	app.mm.SetOrderPreBlockers(
 		upgradetypes.ModuleName,