Custom Collision Object Channels not found

I have 3 custom object channels, and 2 custom trace channels:

When I open my project up I see that the last 2 I’ve created cannot be found:

LogCollisionProfile: Warning: Profile (NoCollision) - Custom Channel Name = 'GameTraceChannel4' hasn't been found
LogCollisionProfile: Warning: Profile (NoCollision) - Custom Channel Name = 'GameTraceChannel5' hasn't been found

In my DefaultEngine.ini I can see them:

+DefaultChannelResponses=(Channel=ECC_GameTraceChannel1,Name="Bullet",DefaultResponse=ECR_Block,bTraceType=True,bStaticObject=False)
+DefaultChannelResponses=(Channel=ECC_GameTraceChannel2,Name="Environment",DefaultResponse=ECR_Block,bTraceType=True,bStaticObject=False)
+DefaultChannelResponses=(Channel=ECC_GameTraceChannel3,Name="GondolaPylonTrigger",DefaultResponse=ECR_Ignore,bTraceType=False,bStaticObject=False)
+DefaultChannelResponses=(Channel=ECC_GameTraceChannel4,Name="GondolaInner",DefaultResponse=ECR_Ignore,bTraceType=False,bStaticObject=False)
+DefaultChannelResponses=(Channel=ECC_GameTraceChannel5,Name="GondolaOuter",DefaultResponse=ECR_Ignore,bTraceType=False,bStaticObject=False)

I can also see these errors if I try to cook it:

UATHelper: Packaging (Windows (64-bit)):   LogCollisionProfile: Warning: Profile (NoCollision) - Custom Channel Name = 'GameTraceChannel4' hasn't been found
UATHelper: Packaging (Windows (64-bit)):   LogCollisionProfile: Warning: Profile (NoCollision) - Custom Channel Name = 'GameTraceChannel5' hasn't been found
PackagingResults: Warning: Profile (NoCollision) - Custom Channel Name = 'GameTraceChannel4' hasn't been found
PackagingResults: Warning: Profile (NoCollision) - Custom Channel Name = 'GameTraceChannel5' hasn't been found

I don’t understand why only these 2 are not seen. I’ve deleted/recreated them, cleaned the intermediate & saved folder, to no avail. What can I do?

As an addition: this warning shows even after removing all content from \Content…

Hello,

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Thanks