When the player has an item with empty AttributeModifiers in their hand, the console is repeatedly spammed with the message

"Unable to create attribute: Modifier name cannot be empty."

To test:

1. Use this command:

   /give @p diamond_hoe 1 0 {AttributeModifiers:[{}]}
   

   or

   /give @p diamond_hoe{AttributeModifiers:[{}]} 1
   

2. Check console