Possible null reference argument for parameter 'entity' in 'EntityEntry<TEntity> DbSet<TEntity>.Update(TEntity entity)'.

Non-nullable property 'Value' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'Color' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'Font' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'Price' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

The type 'MTRPZ4.CoreDomain.Entities.Color?' cannot be used as type parameter 'TEntity' in the generic type or method 'CardService.IncrementCountAsync<TEntity>(int, Func<int?, Task<TEntity>>, Action<TEntity>)'. Nullability of type argument 'MTRPZ4.CoreDomain.Entities.Color?' doesn't match 'class' constraint.

The type 'MTRPZ4.CoreDomain.Entities.Font?' cannot be used as type parameter 'TEntity' in the generic type or method 'CardService.IncrementCountAsync<TEntity>(int, Func<int?, Task<TEntity>>, Action<TEntity>)'. Nullability of type argument 'MTRPZ4.CoreDomain.Entities.Font?' doesn't match 'class' constraint.

The type 'MTRPZ4.CoreDomain.Entities.Price?' cannot be used as type parameter 'TEntity' in the generic type or method 'CardService.IncrementCountAsync<TEntity>(int, Func<int?, Task<TEntity>>, Action<TEntity>)'. Nullability of type argument 'MTRPZ4.CoreDomain.Entities.Price?' doesn't match 'class' constraint.

Possible null reference assignment.