somehow I found someone’s private key in .env file

hey guys, my memory is very bad so I don't remember how I got access to the private key.

a week ago I generated some addresses with ganache (or with some other testing tool) and I put some private keys in a .env file.

well, today I decided to import that private key to my metamask ( just out of curiosity) and I found out that this address belongs to someone.

here is the address :

0x90F8bf6A479f320ead074411a4B0e7944Ea8c9C1

it has aprox 10$ of coins and hundred of thousands of transactions across something like 14 evm compatible chains.

so, can someone tell me how I got the private key of this address ? thanks.

proof that I have the private keys

{ "address": "0x90f8bf6a479f320ead074411a4b0e7944ea8c9c1", "msg": "0x6920616d207468652064756465206f6e20726564646974", "sig": "a1c114d3df5be98917eb61056158a965a54761c92d370c1a85c10aea7f5adca51c23b74c9d12aa995d7a4c62e6469e0a817eb54711776d9890695ae29b8f812f1b", "version": "3", "signer": "MEW" }