One of my ancestors is listed wrong in his first marriage. His name was Albion Purdy Carr, but he is listed as P Carrabion in his marriage index. Here's the url for that Marriage: https://www.familysearch.org/ark:/61903/1:1:KCNV-L14
"We should get it right for those who have gone before us for those who will follow after us." Thanks, Bob Wylie
@Bob Wylie Apologies that you had to wait so long for a reply. Looking at the URL you provided (Thank you for providing it!), we can see that the marriage comes from an index-only record collection. Because we can't see the document from which the index was created, we can't edit the information in the index. If you want to use the record as a source in Family Tree, you can still do that. In the "reason to attach" field of Source Linker, it would be wise to explain the error in the indexing of the name.
You might also want to look around some in the catalog or check out the wiki to see if perhaps there are some marriage records from Maine that have images. Here is a link to the Maine wiki page: https://www.familysearch.org/en/wiki/Maine,_United_States_Genealogy
And here is a link to a Help Center article that can help you search the catalog: https://www.familysearch.org/en/help/helpcenter/article/how-do-i-search-the-catalog-for-records