Item names show if old item has display name visible

[Sven65]

Bug details

Describe the bug
A clear and concise description of what the bug is.

See title

To Reproduce

1. Sell an item with a name that's shown when an item is dropped.
2. See that the item name "Slabbo item" is shown.

Expected behavior

Item name shouldn't be visible

Screenshots

Runtime Configuration

Slabbo Version: 1.0.37

Server Software: Spigot

Server Version: 1.19.3

Other details

Additional context

[Sven65]

Possible fix can be turned into feature, where display name and if it should be showing can be configured, needs looking into, might affect things with keeping track of items in older versions