The instance of entity type ‘XXXX’ cannot be tracked because another instance with the same key value for {‘XXXX’} is already being tracked.

While working my EF core Application I was getting this exception message. I fixed this issue like this

Step 1: In Insert/update method make ensure to detach the entity.

_db.Entry(localRopFiles).State = EntityState.Detached;

Step 2: If you are loading data on page load then use AsNoTracking() method

var query = await _db.LocalRopFiles.AsNoTracking().ToListAsync();

I hope this will help some one who is getting this type of exception.


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