diff --git a/x/group/keeper/keeper_test.go b/x/group/keeper/keeper_test.go
index ba1a7d5337a9..9aa677513312 100644
--- a/x/group/keeper/keeper_test.go
+++ b/x/group/keeper/keeper_test.go
@@ -2759,7 +2759,7 @@ func (s *TestSuite) TestLeaveGroup() {
 			math.NewDecFromInt64(0),
 		},
 		{
-			"valid testcase: decision policy is not present",
+			"valid testcase: decision policy is not present (and group total weight can be 0)",
 			&group.MsgLeaveGroup{
 				GroupId: groupID2,
 				Address: member1.String(),
diff --git a/x/group/keeper/msg_server.go b/x/group/keeper/msg_server.go
index d4f84a3e4a56..06c8f008f178 100644
--- a/x/group/keeper/msg_server.go
+++ b/x/group/keeper/msg_server.go
@@ -102,7 +102,7 @@ func (k Keeper) UpdateGroupMembers(goCtx context.Context, req *group.MsgUpdateGr
 	action := func(g *group.GroupInfo) error {
 		totalWeight, err := math.NewNonNegativeDecFromString(g.TotalWeight)
 		if err != nil {
-			return err
+			return sdkerrors.Wrap(err, "group total weight")
 		}
 		for i := range req.MemberUpdates {
 			if err := k.assertMetadataLength(req.MemberUpdates[i].Metadata, "group member metadata"); err != nil {