CreateExport (LoadErrors) problem

Hi, I am asking you with a problem, because I created a blueprint class (actor), I chewed it on the map and then deleted the file from Content Drawer and it remained on the map and when launching the project, something like this appears in Message Log (Load Errors)
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CreateExport: Failed to load Outer for resource ‘Box’: Demage_cube_C /Game/ThirdPerson/Maps/ThirdPersonMap.ThirdPersonMap:PersistentLevel.Demage_cube_C_UAID_145AFC4BCEE6B71701_1862080655

CreateExport: Failed to load Outer for resource ‘DefaultSceneRoot’: Demage_cube_C /Game/ThirdPerson/Maps/ThirdPersonMap.ThirdPersonMap:PersistentLevel.Demage_cube_C_UAID_145AFC4BCEE6B71701_1862080655

CreateExport: Failed to load Outer for resource ‘Cube’: Demage_cube_C /Game/ThirdPerson/Maps/ThirdPersonMap.ThirdPersonMap:PersistentLevel.Demage_cube_C_UAID_145AFC4BCEE6B71701_1862080655

And I would like to ask you to tell me how to remove this Cube Demage from the map because it is unloaded
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Thank you in advance for your help.