Hi all,

I'm getting an Exception Message: Sequence contains more than one matching element.

Here is my StackTrace:

{"Message":"An error has occurred.","ExceptionMessage":"Sequence contains more than one matching element","ExceptionType":"System.InvalidOperationException","StackTrace":" at System.Linq.Enumerable.Single[TSource](IEnumerable1 source, Func2 predicate)\r\n at Umbraco.Web.Models.Mapping.TabsAndPropertiesResolver.ResolveCore(IContentBase content)\r\n at AutoMapper.ValueResolver2.Resolve(ResolutionResult source)\r\n at System.Linq.Enumerable.Aggregate[TSource,TAccumulate](IEnumerable1 source, TAccumulate seed, Func`3 func)\r\n at AutoMapper.Mappers.TypeMapObjectMapperRegistry.PropertyMapMappingStrategy.MapPropertyValue(ResolutionContext context, IMappingEngineRunner mapper, Object mappedObject, PropertyMap propertyMap)"}

Thanks to all who can help in advance!