How to reproduce:
1. Create new LWRP project (should be using 5.7.0 of LWRP)
2. Publish it to Collab
3. Upgrade LWRP Package to latest version (5.13.0 or greater)
4. Publish it to Collab

Reproducible with: 2019.1.0a7, 2019.1.6f1, 2019.2.0b5, 2019.3.0a5
Not reproducible with: 2017.4.29f1, 2018.4.2f1, 2019.1.0a6

Reproduced with: 1.2.9 - 2.0.0 v17 Collab Packages, doesn't seem to be a package regression

Actual results: Unable to publish to Collab. Generates error in the Console:
[Collab] CopyFile failed:
From path: '/Users/ryancas/Documents/TEST/Collab/TEST_6-7_LWRPCollab/Packages/com.unity.render-pipelines.core/Runtime/Utilities/CameraCaptureBridge.cs', To path: '/Users/ryancas/Documents/TEST/Collab/TEST_6-7_LWRPCollab/Temp/Upload/Packages/com.unity.render-pipelines.core/Runtime/Utilities/CameraCaptureBridge.cs'
Expected results: Upgrading the package shouldn't interfere with publishing.

Tried and reproduced with: Scriptable Build Pipeline, LWRP, TextMeshPro