ArcMap Nibble losing attribute fields

[YakupNiyazi]

I have raster data, I classified it using a decision table. After, boundary cleaning, and regional grouping I have a link filed, which refers to the original classification code. But when I run the Nibble function, the link or other fields disappeared, leading to the loss of the original ID for the classified zones. I am new to spatial analysis, so it will be great if someone with some experience tells me the right way to do it. Thank you.

[DanPatterson]

I would think boundary clean, then nibble, then regiongroup would be the order.

the first two tools can effectively remove zones determined by regiongroup hence the loss of potential zones.