Some new posts can't be created with the same invalid error message about desmos HOT 2 CLOSED

Ok it is an issue that occurred after the first ever message’s edit.
In particular the editing of message with ID == 16, made in tx with txHash = 0900361423873B5B335887099C334AD005A4BEDF3B6FD61F1FC4B775D4DDC46A.
What’s happening here is the following situation:

1. A user edits his/her own post, when this post it’s going to be saved, the LastPostID is set to the current edited post’s one, in our case: 16.
2. After that, everyone who tries to create a new post will get the error Post with id 17 already exists because of the assignment.
   So this is a problem about how we currently handle posts ID and in particular with the way we set the ID to latest post inside handleMsgCreatePost .

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Since I can't push my solution, I'll wrote it down here:
Adding a check (line 56) to make sure that the current post we are saving is a new one and not an edited one.

// Set the last post id
if post.LastEdited == sdk.ZeroInt() {
    store.Set([]byte(types.LastPostIDStoreKey), k.Cdc.MustMarshalBinaryBare(&post.PostID))
}

I think this will be enough, hope it's correct!

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