Unable to delete Productarea Field

Questions
1

Hi,
I’m getting an error in weblog when I try to delete a field from Productarea , Any idea

The instance of entity type ‘FieldDataEntity’ cannot be tracked because another instance with the same key value for {‘OwnerId’, ‘Id’, ‘Culture’, ‘Index’, ‘ChildOwnerId’, ‘ChildIndex’} is already being tracked. When attaching existing entities, ensure that only one entity instance with a given key value is attached. Consider using ‘DbContextOptionsBuilder.EnableSensitiveDataLogging’ to see the conflicting key values.

2

It seems to be used by another instance or thread somehow.
Look if a background job is running or somthing else is using the object.

3

I removed it from the templates but still its not letting to delete. Can you more specific to findout the instances if there

4

Restart your IIS and try.