Schwab tax lots with wash sale dates

I'm looking at my tax lots in my schwab account for a number of positions where it's showing that I'm in the "long term capital gains" bracket but there is also a disallowed loss/wash sale that's included where the date doesn't align with anything in my transaction history.

For example the one line shows for Transaction Open Date:

03/10/2025¹

04/21/2025

(1. Wash Sale activity has adjusted this cost.)

Cost Basis:

$87,713.41

$73,459.90

Holding Period:

Long Term

Disallowed Loss $14,253.51

But here's the issue, in my transaction history I can see the 4/21 purchase, but I have no transactions of any kind in early March. Buys/sells/dividends etc. Nothing. I was expecting to see a purchase on March 10th. Where does the March 10 date come from?