Assuming the bearing has gone in part way, then you’ve had to remove it again, I’d say there’s a burr that needs cleaning out before it’ll go in fully.
Happens quite often if you’re not careful, using a proper bearing press etc.
If it is that, just clean it up with a stanley blade so it’s smooth, grease it up & try again.
If it isn’t that, then I don’t know-I’ve got three sets of those hubs & never had an issue!