Description

In this project, BP with Spot Light registered as Child Actor is placed.
If we copy and build, the following warning will be displayed.

BP_Spotlight_GEN_VARIABLE_BP_Spotlight_C_CAT_330 'BP_Spotlight_GEN_VARIABLE_BP_Spotlight_C_CAT_330' has same light GUID as 'BP_Spotlight_GEN_VARIABLE_BP_Spotlight_C_CAT_323' (Duplicate and replace the orig with the new one)
BP_Spotlight_GEN_VARIABLE_BP_Spotlight_C_CAT_323 'BP_Spotlight_GEN_VARIABLE_BP_Spotlight_C_CAT_323' has same light GUID as 'BP_Spotlight_GEN_VARIABLE_BP_Spotlight_C_CAT_330' (Duplicate and replace the orig with the new one)
BP_Spotlight_GEN_VARIABLE_BP_Spotlight_C_CAT_331 'BP_Spotlight_GEN_VARIABLE_BP_Spotlight_C_CAT_331' has same light GUID as 'BP_Spotlight_GEN_VARIABLE_BP_Spotlight_C_CAT_324' (Duplicate and replace the orig with the new one)
BP_Spotlight_GEN_VARIABLE_BP_Spotlight_C_CAT_324 'BP_Spotlight_GEN_VARIABLE_BP_Spotlight_C_CAT_324' has same light GUID as 'BP_Spotlight_GEN_VARIABLE_BP_Spotlight_C_CAT_331' (Duplicate and replace the orig with the new one)

Steps to Reproduce
  1. Open the attached project.
    [Link Removed]
  2. Select the actor in level and Duplicate.
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  3. Lightmaps seems to break when I run Light build.
    [Link Removed]

Have Comments or More Details?

There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-96220 in the post.

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Won't Fix
ComponentUE - Graphics Features - Lumen
Affects Versions4.255.0.3
CreatedJul 31, 2020
ResolvedJul 19, 2022
UpdatedJul 19, 2022