What happened to the last road ponyglpyh that was in Fishman Island?

During Oden’s flashback we saw 2 ponyglpyhs in Fishman island, the one apologizing for Joyboy which the strawhats had seen and next to it was a read road ponyglyph.

Right now the strawhats got all 3 other ones besides this one. The one from Big mom, the one from Kaido and the one in Zou. Yet this last road ponyglpyh just disappeared from fishman island without any mention, not even Neptune mentioned to Robin that they had it there. It’s extremely odd and now they say it’s hidden with someone with a Fire Scar. What exactly happened? Someone stole the last road Ponyglyph and ran away with it?

Had it not been taken away by the way the straw hats would have all road ponyglpyhs right now. This is something beyond what Roger had to do in his days to reach laughtale