"Corrupted file, ignoring and deleting" warning

Development Platform & Builds
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1

Hi there. I recently updated to 4.20, and while packaging the project I received the following yellow warning.

UATHelper: Packaging (Windows (64-bit)): LogInit: Display: LogDerivedDataCache: Warning: FDerivedDataBackendCorruptionWrapper: Corrupted file, ignoring and deleting TEXTURE_68A083899C6F4316B8CE0E2958EDE2C2_AutoDXT_DE717E054A9136174C55408EA8C63__BD32E16F1D1D8AF34C758228C40336EA76B27977.

The error is in there fifteen times, each with the last two strings of hexadecimal values changed.
The game seems to play fine, and I can’t see any textures that have been deleted; is there a way I can narrow down where the corrupted files are?

2

I was never able to identify what the broken files were, but after deleting my “Saved” and “Intermediate” folders and doing a fresh build, the error stopped.

3

A small update- after the 4.20.1 update, the engine began crashing whenever I approached the area in which the old “corrupted” glitch occurred. Worked out that it did not crash in “unlit” mode. Fix that time was to delete all lights in the level and remake them. Not a big deal as the lights I had in there were only temporary anyway.