Error delete Workflow Definitions in page "workflow-definitions"

error when deleting workflows in the list
Version 2.9.0

`[08:26:13 INF] Executed endpoint 'Elsa.Server.Api.Endpoints.WorkflowDefinitions.Delete.Handle (Elsa.Server.Api)'
[08:26:13 ERR] HTTP DELETE /v1/workflow-definitions/f80a7c70e905482e957d74e8b4259173/AllVersions responded 500 in 365.6514 ms
System.InvalidOperationException: The entity type 'string' was not found. Ensure that the entity type has been added to the model.
at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.GetOrCreateEntry(Object entity)
at Microsoft.EntityFrameworkCore.DbContext.EntryWithoutDetectChanges[TEntity](TEntity entity)
at Microsoft.EntityFrameworkCore.DbContext.Remove[TEntity](TEntity entity)
at Elsa.Persistence.EntityFramework.Core.Extensions.QueryableBulkExtensions.BatchDeleteWithWorkAroundAsync[T](IQueryable`1 queryable, DbContext elsaContext, CancellationToken cancellationToken)
at Elsa.Persistence.EntityFramework.Core.Stores.EntityFrameworkStore`2.<>c__DisplayClass11_0.<b__0>d.MoveNext()
--- End of stack trace from previous location ---
at Elsa.Persistence.EntityFramework.Core.Stores.EntityFrameworkStore`2.DoWork[TResult](Func`2 work, CancellationToken cancellationToken)
at Elsa.Persistence.EntityFramework.Core.Stores.EntityFrameworkStore`2.DoWork[TResult](Func`2 work, CancellationToken cancellationToken)
at Elsa.Persistence.EntityFramework.Core.Stores.EntityFrameworkStore`2.DeleteManyAsync(ISpecification`1 specification, CancellationToken cancellationToken)
at Elsa.Persistence.Decorators.EventPublishingWorkflowDefinitionStore.DeleteManyAsync(ISpecification`1 specification, CancellationToken cancellationToken)
at Elsa.Services.Workflows.WorkflowPublisher.DeleteAsync(String workflowDefinitionId, VersionOptions versionOptions, CancellationToken cancellationToken)
at Elsa.Server.Api.Endpoints.WorkflowDefinitions.Delete.Handle(String definitionId, Nullable`1 versionOptions, CancellationToken cancellationToken)
at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.TaskOfIActionResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.g__Logged|12_1(ControllerActionInvoker invoker)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.g__Awaited|13_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|25_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|20_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Logged|17_1(ResourceInvoker invoker)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Logged|17_1(ResourceInvoker invoker)
at Microsoft.AspNetCore.Routing.EndpointMiddleware.g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
at Serilog.AspNetCore.RequestLoggingMiddleware.Invoke(HttpContext httpContext)
[08:26:14 ERR] [The entity type 'string' was not found. Ensure that the entity type has been added to the model. Request:[ThreadId:3]`