From the official site:
Item #5104 - "PSEUDOMEMORY"[edit | edit source]
Archivist Andrea Suther reported a patch of extraneous data in Omicron’s system CORRUPT DATA four weeks ago. The system acknowledges WAU as the owner and creator of the data making it difficult to simply remove. CORRUPT DATA not believed to impact the rest of the system and has therefore been left alone.
Cameron has revealed the data to be an evolving series of intervals of time - like a time span that is constantly being reconsidered. The data itself is linked to a short flash of images depicting footsteps on a rocky shore CORRUPT DATA incidental, yet pertinent.
Lansky suggested it to be the WAU misinterpreting a video sequence as a part of its own experience - a memory and it’s desperately trying to remember when it happened.