[UE5.1, Bug report] Reference warning in editor, which should not happen in editor.

Development Programming & Scripting C++
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LogSavePackage: Moving output files for package: /Temp/Autosaves/Composure/Blueprints/CompositingElements/BP_CgCaptureCompElement_Auto2
LogSavePackage: Moving '../../../../../Unreal Projects/EEEEEEEEEEE/Saved/BP_CgCaptureCompElement_Auto272E14FD345E44D9FFB4182A5C7C291DB.tmp' to '../../../../../Unreal Projects/EEEEEEEEEEE/Saved/Autosaves/Composure/Blueprints/CompositingElements/BP_CgCaptureCompElement_Auto2.uasset'
LogFileHelpers: Auto-saving content packages took 0.185
Cmd: EDIT CUT
LogUObjectGlobals: Warning: Guid referenced by CineCameraActor /Temp/Autosaves/Game/CCCCCCCC/Maps/AAAAAAA.BBBBBBBB:PersistentLevel.CineCameraActor_0 is already used by CineCameraActor /Game/CCCCCCCC/Maps/BBBBBBBB.BBBBBBBB:PersistentLevel.CineCameraActor_0, which should never happen in the editor but could happen at runtime with duplicate level loading or PIE
LogUObjectGlobals: Warning: Guid referenced by CineCameraActor /Temp/Autosaves/Game/CCCCCCCC/Maps/AAAAAAA.BBBBBBBB:PersistentLevel.CineCameraActor_1 is already used by CineCameraActor /Game/CCCCCCCC/Maps/BBBBBBBB.BBBBBBBB:PersistentLevel.CineCameraActor_1, which should never happen in the editor but could happen at runtime with duplicate level loading or PIE
LogUObjectGlobals: Warning: Guid referenced by CineCameraActor /Temp/Autosaves/Game/CCCCCCCC/Maps/AAAAAAA.BBBBBBBB:PersistentLevel.CineCameraActor_2 is already used by CineCameraActor /Game/CCCCCCCC/Maps/BBBBBBBB.BBBBBBBB:PersistentLevel.CineCameraActor_2, which should never happen in the editor but could happen at runtime with duplicate level loading or PIE
LogUObjectGlobals: Warning: Guid referenced by CineCameraActor /Temp/Autosaves/Game/CCCCCCCC/Maps/AAAAAAA.BBBBBBBB:PersistentLevel.CineCameraActor_3 is already used by CineCameraActor /Game/CCCCCCCC/Maps/BBBBBBBB.BBBBBBBB:PersistentLevel.CineCameraActor_3, which should never happen in the editor but could happen at runtime with duplicate level loading or PIE
LogUObjectGlobals: Warning: Guid referenced by CineCameraActor /Temp/Autosaves/Game/CCCCCCCC/Maps/AAAAAAA.BBBBBBBB:PersistentLevel.CineCameraActor_4 is already used by CineCameraActor /Game/CCCCCCCC/Maps/BBBBBBBB.BBBBBBBB:PersistentLevel.CineCameraActor_4, which should never happen in the editor but could happen at runtime with duplicate level loading or PIE
LogUObjectGlobals: Warning: Guid referenced by CineCameraActor /Temp/Autosaves/Game/CCCCCCCC/Maps/BBBBBBBB_Auto2.BBBBBBBB:PersistentLevel.CineCameraActor_0 is already used by CineCameraActor /Game/CCCCCCCC/Maps/BBBBBBBB.BBBBBBBB:PersistentLevel.CineCameraActor_0, which should never happen in the editor but could happen at runtime with duplicate level loading or PIE
LogUObjectGlobals: Warning: Guid referenced by CineCameraActor /Temp/Autosaves/Game/CCCCCCCC/Maps/BBBBBBBB_Auto2.BBBBBBBB:PersistentLevel.CineCameraActor_1 is already used by CineCameraActor /Game/CCCCCCCC/Maps/BBBBBBBB.BBBBBBBB:PersistentLevel.CineCameraActor_1, which should never happen in the editor but could happen at runtime with duplicate level loading or PIE
LogUObjectGlobals: Warning: Guid referenced by CineCameraActor /Temp/Autosaves/Game/CCCCCCCC/Maps/BBBBBBBB_Auto2.BBBBBBBB:PersistentLevel.CineCameraActor_2 is already used by CineCameraActor /Game/CCCCCCCC/Maps/BBBBBBBB.BBBBBBBB:PersistentLevel.CineCameraActor_2, which should never happen in the editor but could happen at runtime with duplicate level loading or PIE
LogUObjectGlobals: Warning: Guid referenced by CineCameraActor /Temp/Autosaves/Game/CCCCCCCC/Maps/BBBBBBBB_Auto2.BBBBBBBB:PersistentLevel.CineCameraActor_3 is already used by CineCameraActor /Game/CCCCCCCC/Maps/BBBBBBBB.BBBBBBBB:PersistentLevel.CineCameraActor_3, which should never happen in the editor but could happen at runtime with duplicate level loading or PIE
LogUObjectGlobals: Warning: Guid referenced by CineCameraActor /Temp/Autosaves/Game/CCCCCCCC/Maps/BBBBBBBB_Auto2.BBBBBBBB:PersistentLevel.CineCameraActor_4 is already used by CineCameraActor /Game/CCCCCCCC/Maps/BBBBBBBB.BBBBBBBB:PersistentLevel.CineCameraActor_4, which should never happen in the editor but could happen at runtime with duplicate level loading or PIE
LogEditorActor: Actor Cam2_comp is referenced by Cam2_cg_element.
LogEditorActor: Actor Cam2_comp is referenced by Cam1_comp.
LogSlate: Window 'Message' being destroyed
Message dialog closed, result: Yes, title: Message, text: Actor Cam2_comp is referenced by other Actors/Objects.
Do you really want to delete it? This will break references.
Reference List:
Cam2_cg_element
Cam1_comp
LogEditorActor: Deleted Actor: CompositingElement
LogUObjectHash: Compacting FUObjectHashTables data took   1.27ms
LogEditorActor: Deleted 1 Actors (0.115 secs)
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Quite possibly related:

[UE5] TLazyPtr nulls only when travelling to level? - #3 by Roy_Wierer.Seda145