Is this a bad crank plug?

[Slowmo]

I currently have the heads and barrels off my engine to repair the worn valve guides, but looked into the crankcase today and I think I am looking at the typical crank plug backing out and scuffing the crankcase? Any insight into what I am seeing appreciated! I believe I am up for a full disassembly?
Thanks,
Marcus.

20250621_152430.jpg (245.1 KiB) Viewed 3433 times

20250621_152324.jpg (123.72 KiB) Viewed 3433 times

[Tamburinifan]

Looks like it is.
Try to make it spin. If so, definitely lose.