突然我得到以下异常。为了使用实体框架加载或任何与 Db 相关的操作。看不懂，有什么问题！！！！
at System.Data.Metadata.Edm.StoreItemCollection.Loader.ThrowOnNonWarningErrors()
at System.Data.Metadata.Edm.StoreItemCollection.Loader.LoadItems(IEnumerable`1 xmlReaders, IEnumerable`1 sourceFilePaths)
at System.Data.Metadata.Edm.StoreItemCollection.Init(IEnumerable`1 xmlReaders, IEnumerable`1 filePaths, Boolean throwOnError, DbProviderManifest& providerManifest, DbProviderFactory& providerFactory, String& providerManifestToken, Memoizer`2& cachedCTypeFunction)
at System.Data.Metadata.Edm.StoreItemCollection..ctor(IEnumerable`1 xmlReaders)
at System.Data.Entity.ModelConfiguration.Edm.Db.DbDatabaseMetadataExtensions.ToStoreItemCollection(DbDatabaseMetadata database)
at System.Data.Entity.ModelConfiguration.Edm.Db.Mapping.DbDatabaseMappingExtensions.ToMetadataWorkspace(DbDatabaseMapping databaseMapping)
at System.Data.Entity.Internal.CodeFirstCachedMetadataWorkspace..ctor(DbDatabaseMapping databaseMapping)
at System.Data.Entity.Infrastructure.DbCompiledModel..ctor(DbModel model)
at System.Data.Entity.Infrastructure.DbModel.Compile()
at System.Data.Entity.Internal.LazyInternalContext.CreateModel(LazyInternalContext internalContext)
at System.Data.Entity.Internal.RetryLazy`2.GetValue(TInput input)
at System.Data.Entity.Internal.LazyInternalContext.InitializeContext()
at System.Data.Entity.Internal.InternalContext.Initialize()
at System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType)
at System.Data.Entity.Internal.Linq.InternalSet`1.Initialize()
at System.Data.Entity.Internal.Linq.InternalSet`1.get_InternalContext()
at System.Data.Entity.Internal.Linq.InternalSet`1.get_Local()
at System.Data.Entity.DbSet`1.get_Local()
请帮我。它与数据库 Skima 有什么关系吗？无法执行任何类型的数据库操作，至少 15 分钟前，一切正常。不知道，怎么解决？