[MZM] How do I edit the room that contains the boulder in Crateria? (room 1)

[Tsardine]

I've removed the boulder in MAGE, but when I load up the  EDITED rom, the boulder is still there, as is some terrain I edited. The other changes I made to the starting room in Brinstar have been changed, so why can't I edit room 1 in Crateria? Does this have to do with some event/linear pickup system in ZM? Sorry if this has been posted before. I couldn't find anything on the boulder.

Here are the room pics:

https://imgur.com/a/nHz7r

[biospark]

There are two versions of that room, are you sure you edited the correct one?

[Tsardine]

There are two versions of that room, are you sure you edited the correct one?

aaaaAA thank you. I was in fact editing the wrong one.