After I upgraded from v9 to v10 I got this error: "An item with the same key has already been added. Key: " and here is a stack trace

ArgumentException: An item with the same key has already been added. Key: 4262
System.Collections.Generic.Dictionary<TKey, TValue>.TryInsert(TKey key, TValue value, InsertionBehavior behavior)
System.Collections.Generic.Dictionary<TKey, TValue>.Add(TKey key, TValue value)
System.Linq.Enumerable.ToDictionary<TSource, TKey>(List<TSource> source, Func<TSource, TKey> keySelector, IEqualityComparer<TKey> comparer)
System.Linq.Enumerable.ToDictionary<TSource, TKey>(IEnumerable<TSource> source, Func<TSource, TKey> keySelector, IEqualityComparer<TKey> comparer)
System.Linq.Enumerable.ToDictionary<TSource, TKey>(IEnumerable<TSource> source, Func<TSource, TKey> keySelector)
Umbraco.Cms.Infrastructure.Persistence.Repositories.Implement.ContentTypeCommonRepository.MapHistoryCleanup(Dictionary<int, IContentTypeComposition> contentTypes)
Umbraco.Cms.Infrastructure.Persistence.Repositories.Implement.ContentTypeCommonRepository.GetAllTypesInternal()
Umbraco.Extensions.AppCacheExtensions+<>c__DisplayClass0_0<T>.<GetCacheItem>b__0()
Umbraco.Cms.Core.Cache.SafeLazy+<>c__DisplayClass1_0.<GetSafeLazy>b__0()
Umbraco.Cms.Core.Cache.ObjectCacheAppCache.Get(string key, Func<object> factory, Nullable<TimeSpan> timeout, bool isSliding, string[] dependentFiles)
Umbraco.Cms.Core.Cache.DeepCloneAppCache.Get(string key, Func<object> factory, Nullable<TimeSpan> timeout, bool isSliding, string[] dependentFiles)
Umbraco.Extensions.AppCacheExtensions.GetCacheItem<T>(IAppPolicyCache provider, string cacheKey, Func<T> getCacheItem, Nullable<TimeSpan> timeout, bool isSliding, string[] dependentFiles)
Umbraco.Cms.Infrastructure.Persistence.Repositories.Implement.ContentTypeCommonRepository.GetAllTypes()
Umbraco.Cms.Infrastructure.Persistence.Repositories.Implement.ContentTypeRepository.GetAllWithFullCachePolicy()
Umbraco.Cms.Infrastructure.Persistence.Repositories.Implement.ContentTypeRepositoryBase<TEntity>.PerformGetAll(int[] ids)
Umbraco.Cms.Core.Cache.FullDataSetRepositoryCachePolicy<TEntity, TId>.GetAllCached(Func<TId[], IEnumerable<TEntity>> performGetAll)
Umbraco.Cms.Core.Cache.FullDataSetRepositoryCachePolicy<TEntity, TId>.GetAll(TId[] ids, Func<TId[], IEnumerable<TEntity>> performGetAll)
Umbraco.Cms.Infrastructure.Persistence.Repositories.Implement.EntityRepositoryBase<TId, TEntity>.GetMany(TId[] ids)
Umbraco.Cms.Core.Services.ContentTypeServiceBase<TRepository, TItem>.GetAll(int[] ids)
Umbraco.Cms.Infrastructure.PublishedCache.PublishedSnapshotService.LoadContentFromLocalDbLocked(bool onStartup)
Umbraco.Cms.Infrastructure.PublishedCache.PublishedSnapshotService.<EnsureCaches>b__47_1()
Umbraco.Cms.Infrastructure.PublishedCache.PublishedSnapshotService.LockAndLoadContent(Func<bool> action)
Umbraco.Cms.Infrastructure.PublishedCache.PublishedSnapshotService.<EnsureCaches>b__47_0()
System.Threading.LazyInitializer.EnsureInitializedCore<T>(ref T target, ref bool initialized, ref object syncLock, Func<T> valueFactory)
System.Threading.LazyInitializer.EnsureInitialized<T>(ref T target, ref bool initialized, ref object syncLock, Func<T> valueFactory)
Umbraco.Cms.Infrastructure.PublishedCache.PublishedSnapshotService.EnsureCaches()
Umbraco.Cms.Infrastructure.PublishedCache.PublishedSnapshotService.CreatePublishedSnapshot(string previewToken)
Umbraco.Cms.Web.Common.UmbracoContext.UmbracoContext+<>c__DisplayClass11_0.<.ctor>b__0()
System.Lazy<T>.ViaFactory(LazyThreadSafetyMode mode)
System.Lazy<T>.ExecutionAndPublication(LazyHelper executionAndPublication, bool useDefaultConstructor)
System.Lazy<T>.CreateValue()
System.Lazy<T>.get_Value()
Umbraco.Cms.Web.Common.UmbracoContext.UmbracoContext.get_PublishedSnapshot()
Umbraco.Cms.Web.Common.UmbracoContext.UmbracoContext.get_Content()
Umbraco.Cms.Web.Website.Routing.UmbracoRouteValueTransformer.TransformAsync(HttpContext httpContext, RouteValueDictionary values)
System.Threading.Tasks.ValueTask<TResult>.get_Result()
System.Runtime.CompilerServices.ValueTaskAwaiter<TResult>.GetResult()
Microsoft.AspNetCore.Mvc.Routing.DynamicControllerEndpointMatcherPolicy.ApplyAsync(HttpContext httpContext, CandidateSet candidates)
Microsoft.AspNetCore.Routing.Matching.DfaMatcher.SelectEndpointWithPoliciesAsync(HttpContext httpContext, IEndpointSelectorPolicy[] policies, CandidateSet candidateSet)
Microsoft.AspNetCore.Routing.EndpointRoutingMiddleware.<Invoke>g__AwaitMatch|8_1(EndpointRoutingMiddleware middleware, HttpContext httpContext, Task matchTask)
SixLabors.ImageSharp.Web.Middleware.ImageSharpMiddleware.Invoke(HttpContext httpContext, bool retry)
StackExchange.Profiling.MiniProfilerMiddleware.Invoke(HttpContext context) in MiniProfilerMiddleware.cs
Umbraco.Cms.Web.Common.Middleware.UmbracoRequestMiddleware.InvokeAsync(HttpContext context, RequestDelegate next)
Umbraco.Cms.Web.Common.Middleware.UmbracoRequestMiddleware.InvokeAsync(HttpContext context, RequestDelegate next)
Microsoft.AspNetCore.Builder.UseMiddlewareExtensions+<>c__DisplayClass6_1+<<UseMiddlewareInterface>b__1>d.MoveNext()
Umbraco.Cms.Web.Common.Middleware.PreviewAuthenticationMiddleware.InvokeAsync(HttpContext context, RequestDelegate next)
Microsoft.AspNetCore.Builder.UseMiddlewareExtensions+<>c__DisplayClass6_1+<<UseMiddlewareInterface>b__1>d.MoveNext()
Umbraco.Cms.Web.Common.Middleware.UmbracoRequestLoggingMiddleware.InvokeAsync(HttpContext context, RequestDelegate next)
Microsoft.AspNetCore.Builder.UseMiddlewareExtensions+<>c__DisplayClass6_1+<<UseMiddlewareInterface>b__1>d.MoveNext()
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

If I point the app to the test DB it starts fine, which leads me to believe its a data problem.