App is crashing on adding wallets having various number of airdrops and nfts

name: Bug Report
about: App is crashing on adding wallets having various number of airdrops and nfts

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**Describe the bug**
Debug console is showing an error of : "Diffable data source detected item identifiers that are equal but have different hash values. Two identifiers which compare as equal must return the same hash value. You must fix this in the Hashable (Swift) or hash property (Objective-C) implementation for the type of these identifiers. Identifiers that are equal but have different hash values"

**Steps to reproduce (REQUIRED)**
By adding an wallet with various number of nfts and airdrops

**Error Description in detail**
(AlphaWallet.TokensViewModel.ViewModelType.nonFungible(AlphaWallet.NonFungibleTokenViewCellViewModel(safeShortTitleInPluralForm: \"LIDO NFT\", symbol: \"LIDO NFT\", nonZeroBalanceCount: 1, isVisible: true, type: AlphaWalletTokenScript.TokenType.erc1155, contractAddress: ethereumAddress:"", server: AlphaWalletCore.RPCServer.polygon, iconImage: AnyPublisher, accessoryType: __C.UITableViewCellAccessoryType, tokenViewModel: AlphaWalletFoundation.TokenViewModel(contractAddress: ethereumAddress: "" , symbol: \"LIDO NFT\", decimals: 0, server: AlphaWalletCore.RPCServer.polygon, type: AlphaWalletTokenS"